nginx.conf

user  nginx;
worker_processes  1;
daemon off;

error_log  stderr warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  10240;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format elb_log '$proxy_protocol_addr - $remote_user [$time_local] '
                       '"$request" $status $body_bytes_sent "$http_referer" '
                       '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /dev/stdout  elb_log;

    server {
        listen       80;
        server_name  localhost;

        location /nginx_status {
            stub_status;
            access_log off;
            allow 127.0.0.1;
            deny all;
        }
    }

    server {
        listen 8080 proxy_protocol;
        proxy_http_version 1.1;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;

        location / {
            proxy_pass http://SOCKET_SERVER;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_cache_bypass $http_upgrade;
        }
    }

    sendfile        on;
    keepalive_timeout  65;
    include /etc/nginx/conf.d/*.conf;
}