user: What would you need to create a scalable website? What would be the key building blocks for it?

assistant: A scalable website is one that can serve an increasing number of concurrent users with minimal impact to latency or functionality.

First, you should address basic performance considerations that are relevant to any website/web application. This includes caching frequently requested data, optimizing database queries to avoid unnecessary table joins, ensuring your hardware configuration is optimal for the read/write profile of your application, and profiling your code to ensure you have not accidentally introduced pathways that are unnecessarily executing in quadratic time (or worse).

Beyond these basic performance points, there is also vertical and horizontal scalability.

"Vertical scalability" mostly refers to increasing the performance of a single piece of hardware to serve more users. This is mostly independent of the underlying website/web application, so I will assume you are not interested in that.

"Horizontal scalability" mostly refers to whether or not you are able to add (or remove) additional hardware/virtual cloud services in response to increased/decreased demand. 

Achieving horizontal scalability is not simple. Here are some examples of options for increasing horizontal scalability:
1) load balancers
2) database replication and sharding
3) containerized environments
4) microservices
5) parallelized execution

Does this answer your question?

user: Yes. Can you please now provide list of technologies that I need to know in order to build such scalable website myself?

assistant: Certainly, here is a list of technologies that you should be familiar with to build a scalable website:

Server-Side Technologies: You should have a strong understanding of server-side technologies such as Node.js, Ruby on Rails, Django, or Flask. These frameworks will enable you to build robust back-end systems to support your website's functionality.

Caching: Caching is an important aspect of a scalable website. You should be familiar with technologies like Redis and Memcached, which can cache frequently requested data and reduce load on your server.

Load Balancing: Load balancing distributes incoming traffic across multiple servers to prevent any one server from becoming overloaded. You should be familiar with load balancing technologies like Nginx and HAProxy.

Database Scaling: As your website grows, you may need to scale your database to handle increased traffic. Technologies like database replication and sharding can help you scale your database horizontally.

Containerization: Containerization enables you to package your application into standardized units for easier deployment and scaling. You should be familiar with containerization technologies like Docker and Kubernetes.

Microservices: Microservices are small, independently deployable services that work together to form an application. You should be familiar with technologies like Service-Oriented Architecture (SOA) and Representational State Transfer (REST) to build a scalable microservices architecture.

Cloud Computing: Cloud computing enables you to easily scale your website by providing on-demand access to computing resources. You should be familiar with cloud platforms like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP).

I hope this list helps you get started on building a scalable website. Let me know if you have any other questions!