server {
 listen 80;
 server_name frontend;

 location = / {
   proxy_pass http://${PROXY_HOST}:${RPC_PORT};
 }

 location /ws {
   proxy_pass http://${PROXY_HOST}:${WS_PORT};
   proxy_http_version  1.1;
   proxy_set_header    Upgrade $http_upgrade;
   proxy_set_header    Connection "upgrade";
   proxy_set_header    Host $http_host;
   proxy_set_header    X-Real-IP $remote_addr;
 }
}