teleren/devto huggingface dataset:
Docker tutorial - understanding of Dockerfile
Tags: tutorial, beginners, docker
Published: 2023-01-16 19:28:52

## Content
- [What is Dockerfile?](#what-is-dockerfile?)
- [Why do we need it?](#why-do-we-need-it?)
- [Essential commands](#essential-commands)
- [Baking an image](#baking-an-image)
- [Starting a container](#starting-a-container)
- [Conclusion](#conclusion)

## What is Dockerfile?
Dockerfile is a text file that contains a set of instructions. If run, we can build an image. Then we can run containers with a built image

## Why do we need it?
We can use pre-built images like Postgres. Yet, we have to build images for our core services though. To containerize this, we have to make Dockerfile. Thanks to its simplicity, we can start building our images with a few commands.

## Essential commands
The following commands are the basic ingredients to build an image. 

`FROM` tells the base image to start the process. E.g) linux-alpine
`RUN` and `CMD` tell commands to run. 
The difference is `RUN` will get executed while building an image. `CMD` will get executed by default when we launch the built image.
`ADD` copies the files from the source to the destination inside the container.
`ENV` sets the environment variables
`ARG` variables are only available while building an image.
`EXPOSE` tells the Docker container to listen to specific ports.
`WORKDIR` sets the working directory for commands like `RUN`

## Baking an image
Now you understand the basic commands, let's look at the following one.

```
# syntax=docker/dockerfile:1
FROM node:18-alpine
WORKDIR /app
COPY . .
RUN yarn install --production
CMD ["node", "src/index.js"]
EXPOSE 3000
```

With the base image node, it will copy all from /app to /app. Next, it will run yarn install for dependencies. Once it finishes the installation. The process completes. 

Tip: CMD and EXPOSE will get run when starting a container based on this image. 

To build an image, run 
```
docker build -t first-try.
```

This will build an image. If you pass `.`, Docker will look for Dockerfile in the current directory. After building an image, it will tag the image you pass. In this case, I tag it as a "first-try". 
Tip: tag is not required. It's more for a human-readable label.

## Starting a container
Once we have the Docker image baked, we can run a container. Run, 
```
docker run -d first-try
```
Tip: `-d` is the option for detached mode. If you pass this option, Docker will run in the background. 

To see your container's status, run `docker ps`. 

## Conclusion
Now, you should be able to build an image and run containers with your image. What if we need to run more complicated software? What if it has a database or cache? Docker provides a tool `docker compose` for running a multi-container codebase. We will look into it in the next article.

If you like this content, follow @bitethecode or my [Github](https://github.com/bitethecode)
How to Reduce Customer Churn Rate in Your SaaS Company
Tags: churn, startup
Published: 2023-01-16 19:19:17

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/gug3k16fo3irhbphj1ta.png)
Customer churn is one of the most important SaaS metrics. The cancellation rate of existing customers is measured here. As a result of customer churn, your company's revenues decrease.

You can improve customer retention by calculating churn rate correctly. It is difficult to calculate churn rate accurately, which leads to many people underestimating it.

**_Reduce churn by using these strategies_**

- Improve your onboarding process
- Make it easy for your customers to reach you
- In terms of pricing, there are no misunderstandings
- Add value continuously

See **[how to reduce the churn rate](https://churnfree.com/blog/how-to-reduce-customer-churn-rate-in-your-saas-company/
![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/3gsl3fzvhbilvl0o0xam.png))** of your SaaS company in depth
Inbound call center services
Published: 2023-01-16 19:17:17

[Inbound call center services](https://www.touchstonebpo.com/inbound-call-center-service/) refer to the process of managing and handling incoming calls from customers. These calls are typically related to customer service, technical support, order taking, help desk support, appointment scheduling, surveys, return and exchange management, and troubleshooting. The goal of inbound call center services is to provide an efficient and satisfactory customer experience while addressing their needs and resolving any issues they may have.
Inbound call center services are an essential aspect of any business, as they provide a direct line of communication between the company and its customers. By having a dedicated team of customer service representatives available to answer calls, businesses can ensure that their customers receive the support and assistance they need in a timely manner. This not only improves customer satisfaction, but it also helps to build trust and loyalty among customers, which can lead to increased sales and revenue for the business.
[Inbound call center Solution](https://www.touchstonebpo.com/inbound-call-center-service/) can be provided by a company's internal team or by outsourcing the service to a third-party provider. Outsourcing inbound call center services has become a popular option for businesses of all sizes, as it allows them to access a team of skilled and experienced customer service representatives without the need to hire and train employees in-house. This can help to reduce costs, while also ensuring that customers are always able to reach a representative when they need assistance.
Inbound call center services can be provided through a variety of platforms, including Five9, Genesys, NICE inContact, Aspect Software, 8x8, Avaya, Cisco, and Zendesk. Each of these platforms offers a range of features and tools that can be tailored to meet the specific needs of a business. For example, some platforms may offer advanced reporting and analytics, while others may focus on providing a more personalized customer experience.
When it comes to optimizing the keywords "Inbound call center services", "Inbound call center solution", "Inbound call center outsourcing", and "affordable call center services in the US", it is important to focus on the specific needs of your business and the target audience you are trying to reach. For example, if you are a small business looking for an affordable inbound call center solution, you may want to focus on keywords such as "budget-friendly inbound call center services" or "affordable inbound customer service solutions". On the other hand, if you are a larger company looking to outsource your inbound call center services, you may want to focus on keywords such as "inbound call center outsourcing options" or "professional inbound call center services".
Volumes in Kubernetes- Part 1 (emptyDir)
Tags: kubernetes, devops, beginners, tutorial
Published: 2023-01-16 18:04:04

**Volumes:**
State in kubernetes:
Data created and used by your application which must not be lost.
Types of data
	1. User generated data
	2. Intermediate data (either memory or temp. database)

**Volumes** in kubernetes are used to store the data of running pods. There are situations in live production environments when production pods get terminated, data inside those pods is important, now to avoid the loss of this data volumes are used in kubernetes.
Kubernetes can mount volumes in containers. We can set an instruction in the pod template which basically is part of **deployment.yml** that mounts a volume to the container that gets created with the pod which came up via deployment.yml.
Kubernetes provides various types of volumes: 
Local Node: A directory on the worker node where the pod is running.
Cloud Provider Specific

Lifetime of a volume by default depends on the lifetime of a pod as volumes are part of the pod.

In the deployment.yml file: 
We need to add the volume key inside the **spec.template.spec**. It basically is a list of volumes. We can give names to every volume that we create and these volumes will be accessible by all the containers  inside that pod.
Under the name, we have to set up the volume type.

```
apiVersion: apps/v1
kind: Deployment
metadata:
    name: <name_of_deployment>
spec:
    replicas: 1
    selector:
        matchLabels:
            a: b
    spec:
        template:
            metadata:
                labels: 
                    a: b
            containers:
                - name: <name_of_container>
                  image: deocker_repo/<image_name>
            volumes:
                - name: <name_of_volumes>
                  emptyDir: {}
```

**emptyDir: {}**
EmptyDir is a type of volume that is used in kubernetes to store data.
This means we want to use all the default values and no configuration is declared instead default is used as it.
It simply creates a new empty directory whenever the pod starts and keeps the directory and writes the data till the lifespan of the pod. Containers can easily perform Write operation over it but if the pod dies, emptyDir dies with the pod i.e. this volume also terminates, and when a pod is created again a new empty directory is created.

Now, after creating a volume we need to bind the volume with the container, therefore we need to make it available inside of the container in container configuration with the volumeMounts keyword.
It takes the list. It takes mountPath i.e. which is the container internal path where the volume is mounted .
name keyword is used to mount the volume/s that we created above to the mountPath i.e. path internal of containers.
osdc-2023-assignment2
Tags: github, osdc
Published: 2023-01-16 19:06:23

---
series: osdc
---

My first assignment in [osdc 2](https://github.com/OSDC-Code-Maven/osdc-2023-01-public) was to follow all my course friends who already have a dev.to account:
@shulyavraham
@adieg
@yoadk
@silent_mobius
@dshisher
@anatlavitzkovitz
@avivyunker

Next, I created [GitHub page](https://anatlavitzkovitz.github.io/). __How?__
in [My GitHub](https://anatlavitzkovitz.github) I created a new repository with my name, in general: github_username.github.io.
Within this rep I create a docs folder and in the docs folder create a file called index.md. containing the context of my website and even with a painting of me done by my talented mom.
I added links to my GitHub and GitLab repositories, to my blog at dev.to and to the [course](https://osdc.code-maven.com/).

I added my CV in Markdown to docs/cv.md:  [cv](https://anatlavitzkovitz.github.io/cv)

In the setting of [my webpage](https://anatlavitzkovitz.github.io), I changed pages to deploy main branch from docs/. how? like this:
Go to Settings->Pages->Deploy from a branch->main ->Select /Docs->Save.

To add a colored background I added a file to docs/ called _config.yml, containing the following markdown colored theme:
theme: jekyll-theme-cayman.

Finally, I pushed this post in to my json in [OSDC](https://github.com/OSDC-Code-Maven/osdc-2023-01-public):
[pull request] (https://github.com/OSDC-Code-Maven/osdc-2023-01-public/pull/50)

__Time investment:__
2.5 hours
Time to pivot
Tags: beginners
Published: 2023-01-16 18:52:42

I've been studying Java because seasoned programmers recommend it. I have made a concerted effort to know all the best words in this language. When I sit down to create my own project, I'm stuck.

But it's not the same kind of stuck as when I sit down to write a post and I have writer's block. It's the kind of stuck where I can't take a single step without following someone else's example. 

There is so much to this language that has to do with how to make a program run efficiently, how to make it easy to read, how to make it well-organized; how to make tweaks that are only visible "under the hood".

In order to stay motivated, I need the gratification that comes from delivering something more tangible (UI/UX stuff; interactive websites).


93
Important tips to learn PHP
Published: 2023-01-16 18:44:25

Before leaning PHP it is better to plan the journey or craft the the learning procedure. Because many Professional PHP developers had recommended that to plan the process of the leaning path is the best method to start leaning of PHP.

A research conducted by Harvard and MIT found that only 4% of students who enroll in online courses completes them and the rest of them lefts the classes in the middle.

So how can I help you avoid becoming another of the 96% of people who give up?

I have compiled the list of 10 pointers in that pointer I have clearly mentioned that how you can start learning PHP effectively, keep motivated and also avoid some potential pitfalls.

So to know the points you can reach out to our blogpost 
https://codingsutra.in/important-10-tips-to-learn-php/ to know more.

Thank you may this will help you in your journey.
Filter: A JavaScript Iterator
Tags: javascript, filter, iterator
Published: 2023-01-16 18:30:55

The filter iterator is similar to a map as it returns an array and does not change the original array as discussed in our last session. https://dev.to/michellebuchiokonicha/map-a-javascript-iterator-1oem

However, unlike a map, its callback must return an expression that evaluates to true or false. The new array is filtered and filled with elements that passed the true or false evaluation/test implemented by the provided function. Required parameters include function, current value, index, array, and value. The index, array, and value are optional but the function and current value are compulsory fields.

An example: let houseNumbers = [45, 66, 26, 92]; let highHouseNumbers = houseNumbers.filter(function(val){ return val > 45; } the result is : [66, 92];

Another example: var wordPlay = [mimi, cat, money, veggie] var newWords = wordPlay.filter(play =>play.length > 4); console.log(newWords) the result is: [money, veggie];

notice that here, I used a declarative function in the first example and an arrow function in the second example.

Both will produce the same result.

My Twitter Handle: https://twitter.com/mchelleOkonicha

My LinkedIn Handle: https://www.linkedin.com/in/buchi-michelle-okonicha-0a3b2b194/
Why you should consider using the MERN stack for your next web development project
Tags: webdev, javascript, beginners, programming
Published: 2023-01-16 18:22:00

The #MERN stack is a combination of four technologies that are quickly becoming a go-to choice for many web developers. The stack consists of MongoDB, Express, React, and Node.js, and it provides a powerful and flexible platform for building web applications. If you're not already using the MERN stack, you may be missing out on a lot of benefits that this technology can offer.

MongoDB is a NoSQL database that allows for easy scalability and data management. It uses a document-based data model, which makes it a great fit for web applications that need to store and retrieve large amounts of data quickly and easily.

Express is a web application framework for Node.js that provides a robust set of features for web and mobile applications. It allows for easy routing, middleware, and API development, making it a great choice for building web applications with Node.js.

React is a JavaScript library for building user interfaces. It allows for the creation of reusable UI components and efficient updates, making it a great choice for building dynamic, responsive web applications.

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It allows for easy server-side development with JavaScript, making it a great choice for building full-stack web applications.

One of the key benefits of the MERN stack is its ability to handle large amounts of data and traffic. MongoDB's document-based data model allows for easy scalability, while Node.js and Express handle the server-side logic and routing. React, on the other hand, allows for efficient updates to the user interface, making it a great choice for building dynamic, responsive web applications.

Another benefit of the MERN stack is its ability to speed up the development process. By using JavaScript on both the front-end and back-end, developers can use the same language and development tools throughout the entire application. This eliminates the need to switch between languages and frameworks, making the development process more efficient.

In addition, the MERN stack is open-source and free to use, and it has a large and active community of developers who are constantly working to improve and update the technology. This means that you'll always have access to the latest features and tools, and you'll be able to find plenty of resources and support when you need it.

Overall, if you're not already using the MERN stack, you're missing out on a lot of benefits that this technology can offer. It's a powerful, flexible, and efficient way to build web applications, and it's quickly becoming one of the most popular choices among developers. If you're looking to build a web application, consider giving the MERN stack a try, you'll be impressed by its simplicity and effectiveness.
Unleashing the Power of the MERN Stack: Building Scalable, High-Performance Web Applications
Tags: webdev, javascript, beginners, programming
Published: 2023-01-16 18:15:42

Building full-stack web applications with the #MERN stack is a dream come true for many developers. The combination of MongoDB, Express, React, and Node.js provides unmatched flexibility and power, making it one of the most efficient and effective ways to build web applications.

MongoDB is a NoSQL database that allows for easy scalability and data management. It uses a document-based data model, which makes it a great fit for web applications that need to store and retrieve large amounts of data quickly and easily.

Express is a web application framework for Node.js that provides a robust set of features for web and mobile applications. It allows for easy routing, middleware, and API development, making it a great choice for building web applications with Node.js.

React is a JavaScript library for building user interfaces. It allows for the creation of reusable UI components and efficient updates, making it a great choice for building dynamic, responsive web applications.

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. It allows for easy server-side development with JavaScript, making it a great choice for building full-stack web applications.

Together, these technologies provide a powerful and flexible stack for building web applications. The ability to use JavaScript on both the front-end and back-end, along with the scalability and data management capabilities of MongoDB, make the MERN stack a top choice for many developers.

One of the key benefits of the MERN stack is its ability to handle large amounts of data and traffic. MongoDB's document-based data model allows for easy scalability, while Node.js and Express handle the server-side logic and routing. React, on the other hand, allows for efficient updates to the user interface, making it a great choice for building dynamic, responsive web applications.

Another benefit of the MERN stack is its ability to speed up the development process. By using JavaScript on both the front-end and back-end, developers can use the same language and development tools throughout the entire application. This eliminates the need to switch between languages and frameworks, making the development process more efficient.

In conclusion, building full-stack web applications with the #MERN stack is a dream come true for many developers. The combination of MongoDB, Express, React, and Node.js provides unmatched flexibility and power, making it one of the most efficient and effective ways to build web applications. With the ability to handle large amounts of data and traffic, speed up the development process and use the same language and development tools throughout the entire application, it's no wonder the MERN stack is becoming a top choice for many developers.
Amazon Simple Storage Service S3 - AWS
Published: 2023-01-16 18:09:02

Amazon Simple Storage Service (Amazon S3) is an object storage service offering industry-leading scalability, data availability, security, and performance. Customers of all sizes and industries can store and protect any amount of data for virtually any use case, such as data lakes, cloud-native applications, and mobile apps. With cost-effective storage classes and easy-to-use management features, you can optimize costs, organize data, and configure fine-tuned access controls to meet specific business, organizational, and compliance requirements.

S3 is SaaS

[<< Back to AWS Training](https://dev.to/c4rlosc7/aws-part-1-5hh0)
Elastic Block Store EBS - AWS
Published: 2023-01-16 18:02:20

Amazon Elastic Block Store (Amazon EBS) is an easy-to-use, scalable, high-performance block-storage service designed for Amazon Elastic Compute Cloud (Amazon EC2).

EBS is IaaS

![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/l5ii9kkpdp7wsfog4vb4.png)

[<< Back to AWS Training](https://dev.to/c4rlosc7/aws-part-1-5hh0)
HOW TO INSTALL NGROK IN TERMUX ANDROID
Tags: termux, android
Published: 2023-01-16 17:55:24


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/qyiwa8v3qazzstnofyxw.png)


Hii guys 

How to install ngrok in termux android follow these steps or watch video to download termux and ngrok without any error 

STEP - 1 : open you android browser and search f-droid or Click Here to open f-droid official website


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/rnnteafamtem5e2gjd06.png)


STEP - 2 :  After downloading the f-droid apk and install it on your mobile open f-droid and search for termux and install 


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/688e5p7pt8mhs8o34voi.jpeg)


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/s2hdhvslogqkkonrtqmx.jpeg)


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/sslton9emwp5tzsse0hc.jpeg)



STEP - 3 : Open termux 

STEP - 4 : And type the command called "pkg install wget"

STEP - 5 : Second command "pkg update wget"

STEP - 6 : Third command "pkg install git"

STEP - 7 ; Fourth command "wget 'ngrok download link' "

STEP - 8 : Fifth command "./ngrok you auth token number"

STEP - 9 : Sixth command "./ngrok http 80"

And do not forget to turn on your mobile hotspot
All you need to know about LastPass Vaults
Published: 2023-01-16 17:49:25

---
title: All you need to know about LastPass Vaults
published: true
description: I looked into LastPass Vaults, what is stored and how secure are we using LastPass after their breach were all vaults with password where stolen.
tags:
cover_image: https://i.ytimg.com/vi/OizXf-Hei0c/maxresdefault.jpg
---

{% youtube OizXf-Hei0c %}

I looked into LastPass Vaults, what is stored and how secure are we using LastPass after their breach were all vaults with password where stolen.
Front-end vs Back-end
Tags: beginners
Published: 2023-01-16 17:30:28

FRONT-END DEVELOPERS:
. Front-end developers work on what the user can see while back-end developers build the infrastructure that supports it .
. Front-end refers to the user interface.
BACK-END DEVELOPERS: 
. Back-end developers consists of the server which provides data on request.
.Back-end means the server, application and database.