Docker Image for WebSockets and SSL with Nginx:alpine

One possible Docker image that supports both WebSockets and SSL protocols is the 'nginx:alpine' image with the 'ngx_http_websocket_module' and SSL module enabled. This image is based on Alpine Linux, a lightweight distribution that is known for its small size and security.

To create a Docker container with this image, you can use the following command:

docker run -d -p 80:80 -p 443:443 -p 8080:8080 --name my-nginx \
-v /path/to/nginx.conf:/etc/nginx/nginx.conf \
-v /path/to/cert.crt:/etc/nginx/cert.crt \
-v /path/to/cert.key:/etc/nginx/cert.key \
nginx:alpine

This command starts a container named 'my-nginx' and maps ports 80, 443, and 8080 to the host machine. It also mounts the 'nginx.conf' file and SSL certificate and key files from the host machine to the container's file system.

Once the container is running, you can configure it to use WebSockets and SSL by editing the 'nginx.conf' file. Here is an example configuration:

worker_processes auto;

events {
    worker_connections 1024;
}

http {
    include /etc/nginx/mime.types;

    upstream websocket {
        server 127.0.0.1:8080;
    }

    server {
        listen 80;
        server_name example.com;
        return 301 https://$server_name$request_uri;
    }

    server {
        listen 443 ssl;
        server_name example.com;

        ssl_certificate /etc/nginx/cert.crt;
        ssl_certificate_key /etc/nginx/cert.key;

        location / {
            proxy_pass http://websocket;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
        }
    }
}

This configuration sets up a WebSocket upstream server at port 8080 and proxies requests to it from the SSL-enabled server at port 443. It also redirects HTTP requests to HTTPS and enables the WebSocket and SSL protocols.

Note that this is just an example configuration and you may need to modify it to suit your specific needs.