User: why is my stage 2 related to nginx is not running.
docker doesnt show in terminal install nginx also no directory of nginx is getting created
# Stage 1: Build the Angular application
FROM node:18-alpine3.20 as build-step
 
WORKDIR /usr/local/app
 
# Copy package.json and install dependencies
COPY package.json /usr/local/app
COPY .npmrc /usr/local/app
 
ARG git_token
RUN npm install
 
# Copy the rest of the application code
COPY . /usr/local/app
 
# Build the Angular app for production
ARG ZXBILD='prod'
RUN if [ "$ZXBILD" = "prod" ]; then \
  npm run zxProd; fi
 
# Stage 2: Set up NGINX to serve Angular static files
FROM nginx
 
# Copy NGINX configuration
COPY nginx.conf /etc/nginx/nginx.conf
 
# Copy built Angular files to NGINX default location
COPY --from=build-step /usr/local/app/dist/zx-rp /usr/share/nginx/html
 
# Expose NGINX port
EXPOSE 80
 
# Stage 3: Run the Node.js Express server
FROM node:18-alpine3.20 as server-step
 
WORKDIR /usr/local/app
 
# Copy built Angular files and server code
COPY --from=build-step /usr/local/app/dist/zx-rp /usr/local/app/dist/zx-rp
COPY --from=build-step /usr/local/app/server.js /usr/local/app/server.js
 
# Install Express dependencies
RUN npm install express
 
# Expose Express server port
EXPOSE 4200
 
# Start the Express server
CMD ["node", "server.js"]
 
# Multi-process mode to run both NGINX and Express
# Using supervisord or similar is required if you need both running together.

Assistant: Your Dockerfile consists of a multi-stage build that aims to create an Angular application and serve it using NGINX, while also running a Node.js Express server. If stage 2 related to NGINX is not running or showing any output, here are a few things to troubleshoot and consider:

### 1. Verify NGINX Installation
Ensure that the NGINX image is being pulled correctly during the build process. If there's an issue with Docker pulling the NGINX image, it won’t be able to run.

### 2. Docker Build and Run
Make sure you’re building your Docker image correctly and running the appropriate stage. You can build your Docker image with a command like:

```sh
docker build -t my-app .
```

And then run it:

```sh
docker run -p 80:80 my-app
```

This should map port 80 of your host to port 80 of the NGINX container.

### 3. Check the Logs
If the NGINX server is not running, check the containers' logs to gather more information:

```sh
docker logs <nginx_container_id>
```

Replace `<nginx_container_id>` with the actual ID of your NGINX container to see if there are any errors.

### 4. NGINX Configuration
Make sure your `nginx.conf` is present in the same directory as your Dockerfile or specify the correct path. A bad configuration might prevent NGINX from starting up. A simple example of an NGINX configuration for serving an Angular app looks like this:

```nginx
server {
    listen 80;
    server_name localhost;

    location / {
        root /usr/share/nginx/html;
        try_files $uri $uri/ /index.html;
    }
}
```

### 5. Running NGINX in the Main Container
You are currently building your Docker setup in multiple stages with a focus on running the node server in the last stage. If you want to run NGINX and an Express server together, you'll need an approach that allows multiple processes to run in the same container using tools like `supervisord`. This is typically not recommended for Docker since each container is best when running one service. However, here’s a quick overview of how to set it up:

1. **Create a Supervisor Configuration**: Create a supervisor configuration file to manage both processes.
2. **Install Supervisor**: You would need to modify your Node.js server stage to install supervisor.

You can refer to this as a starting point:

```Dockerfile
# Stage 2 for NGINX with supervisor
FROM nginx

RUN apk add --no-cache supervisor
COPY supervisord.conf /etc/supervisord.conf

# Make sure the command is configured to run supervisord
CMD ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]

# In supervisord.conf you will define commands like:
# [program:nginx]
# command=nginx -g 'daemon off;'
# [program:node]
# command=node /usr/local/app/server.js
```

### 6. Container Networking
Also, remember that if you start NGINX in one container and the Node.js server in another, they will not be able to communicate directly unless they are part of the same Docker network.

### Conclusion
If you follow these troubleshooting steps, you should be able to isolate and resolve why your NGINX process isn’t running effectively. Make sure to validate configurations and the Docker build process. If you are still having trouble, please share additional logs or errors for more detailed assistance.
User: can you give me correct conf for nginx
Assistant: Certainly! Here's a basic NGINX configuration file that should work well for serving an Angular application. This configuration assumes that your built Angular application files will be located in `/usr/share/nginx/html`, which corresponds to where you copy them in your Dockerfile.

### Basic NGINX Configuration (`nginx.conf`)

```nginx
server {
    listen 80;
    server_name localhost;

    root /usr/share/nginx/html;

    index index.html;

    location / {
        # serve static files
        try_files $uri $uri/ /index.html;
    }

    location ~ /\.ht {
        deny all;  # Deny access to hidden files starting with .
    }

    error_page 404 /404.html;
    location = /404.html {
        internal;
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        internal;
    }
}
```

### Explanation:

1. **listen 80;**: This tells NGINX to listen for incoming requests on port 80.

2. **server_name localhost;**: This specifies the server name; `localhost` is suitable for local development. You might want to adjust this for production.

3. **root /usr/share/nginx/html;**: This sets the root directory for the server, which is where the built Angular files will be located.

4. **index index.html;**: Specifies the default file to serve when a directory is requested.

5. **location /**: This block handles requests to root and checks if the requested file exists. If it doesn't, it falls back to serving `index.html`, which is necessary for single-page applications like Angular.

6. **location ~ /\.ht { deny all; }**: This denies access to any hidden files (e.g., `.htaccess`).

7. **error_page** configurations: Custom error pages can be served for various error types, helping handle issues gracefully.

### Usage in Dockerfile

Make sure you place this `nginx.conf` either in the same directory as your Dockerfile or adjust the `COPY nginx.conf /etc/nginx/nginx.conf` line in your Dockerfile accordingly to point to its location.

### Example of Building and Running

After creating the configuration file, ensure you rebuild your Docker image and run it as before:

```sh
docker build -t my-angular-app .
docker run -p 80:80 my-angular-app
```

This setup should allow your Angular application to be served correctly through NGINX. If you experience any issues, be sure to check the logs for more information on errors.
User: i tried running stage 1 and stage 2 then its working but with stage 3 its not so is it because we require docker compose setup and we cant include stage 3 in same dockerfile
Assistant: