Nginx Configuration support Web Socket handshake

nginx.conf

http {
  ...
  server {
    ...
		location /ws {
			proxy_pass http://127.0.0.1:8080/ws;
			proxy_http_version 1.1;
			proxy_set_header Upgrade $http_upgrade;
			proxy_set_header Connection "upgrade";
		}
	}
	...
}