nginx.conf

events {}
http {
    server {
        listen       80;
        server_name  localhost;
        location / {
            proxy_pass http://frontend:3001;
        }
        location /api/ {
            proxy_pass http://voteapi:5001/;
        }
        # location /sockets/ {
        #     proxy_pass http://voteapi:5001/; 
        #     proxy_http_version 1.1;
        #     proxy_set_header Upgrade $http_upgrade;
        #     proxy_set_header Connection 'upgrade';
        #     proxy_set_header Host $host;
        #     proxy_cache_bypass $http_upgrade;
        # }
        location ~* \.io {
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_set_header X-NginX-Proxy false;

            proxy_pass http://voteapi:5001;
            proxy_redirect off;

            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
}