Docker Compose Example

Create docker network, which is going to be used by proxy and proxied servers.

docker network create proxy-net

Example of docker-compose.yaml

version: '3.9'

services:
  proxy:
    container_name: proxy
    image: nginxproxy/nginx-proxy
    ports:
      - 80:80
      - 443:443
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
    environment:
      - TRUST_DOWNSTREAM_PROXY=false  # true if there is another proxy in front of this one
    networks: 
      - proxy-net  # proxy and all proxied servers have to be on the same network

  proxied_server1:
    image: your_image:latest
    environment:
      - VIRTUAL_HOST=your.domain.com
      - VIRTUAL_PORT=3000 # the same port as in expose
    expose:
      - 3000  # port your app uses to communicate
    depends_on:
      - proxy
    networks:
      - proxy-net

networks:
  proxy-net:
    name: proxy-net
    external: true