really/nginx-lua repository overview

env OTHER-CONTAINER_PORT_8080_TCP_ADDR;

# Snip

http {
  # Snip

  server {
    # The IP that you forwarded in your router (nginx proxy)
    listen       80;
    listen       [::]:80;

    server_name example.com;
    resolver 8.8.8.8;

    # Get the IP of the linked Docker Container
    set_by_lua $upstreamip 'return os.getenv("OTHER-CONTAINER_PORT_8080_TCP_ADDR")';
    set $upstream "http://${upstreamip}:8080";

    location / {

      proxy_pass_header Authorization;
      proxy_pass $upstream;
      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_http_version 1.1;
      proxy_set_header Connection "";
      proxy_buffering off;
      client_max_body_size 0;
      proxy_read_timeout 36000s;
      proxy_redirect off;

    }

  }

}