nginx/nginx.conf

events { worker_connections 2048; }

http {
    client_max_body_size 500M;

    keepalive_timeout     600;
    proxy_connect_timeout 600;
    proxy_send_timeout    600;
    proxy_read_timeout    600;
    send_timeout          600;

    server {
        listen 3000;

        location /ws {
            proxy_http_version 1.1;
            proxy_set_header Accept-Encoding gzip;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            add_header Cache-Control no-cache;
            proxy_set_header Host $host;

            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
	        proxy_set_header   X-Real-IP		$remote_addr;
            proxy_pass http://localhost:3001;
        }

        location /queue/join {
            proxy_http_version 1.1;
            proxy_set_header Accept-Encoding gzip;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            add_header Cache-Control no-cache;
            proxy_set_header Host $host;

            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
	        proxy_set_header   X-Real-IP		$remote_addr;
            proxy_pass http://localhost:3001;
        }

        location / {
            add_header Cache-Control no-cache;
            proxy_pass http://localhost:3001;
            proxy_http_version 1.1;
            proxy_set_header Accept-Encoding gzip;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Host $host;

            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto $scheme;


            proxy_intercept_errors on;
            error_page 502 =200 @502;
        }

        location /README.md {
            root /usr/share/nginx/html;
        }

        location @502 {
            # kill cache
            add_header Last-Modified $date_gmt;
            add_header Cache-Control 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
            if_modified_since off;
            expires off;
            etag off;

            root /usr/share/nginx/html;
            rewrite ^(.*)$ /502.html break;
        }
    }
}