upstream client {
  server client:3000;
}

upstream server {
  server server:3001;
}

server {
  listen 80;

  location / {
      proxy_pass http://client;
  }

  location /static {
      proxy_pass http://client;
  }

  location /sockjs-node {
      proxy_pass http://client;
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "Upgrade";
  }

  location /socket.io {
      proxy_pass http://server;
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "Upgrade";
  }

  location /api {
      proxy_pass http://server;
  }
}