Reverse Proxy with traefik + docker

docker-compose.yml

version: '3'

# Maintainer: Emad Aghajani
# Source and guideline: https://gist.github.com/emadpres/e21c09f56829fa7a84ebf78ed7ad4fe1

services:
  reverseproxy:
    image: traefik:v2.0
    container_name: reverseproxy
    # Enables the web UI + tells Traefik to listen to docker + provide DEBUG-level logs
    command: --api.insecure=true --providers.docker --log.Level=DEBUG
    ports:
      # The HTTP port
      - 80:80
      # The Web UI (enabled by --api.insecure=true)
      - "8080:8080"
    volumes:
      # So that Traefik can listen to the Docker events
      - /var/run/docker.sock:/var/run/docker.sock
    networks:
      - reverseproxy-network

networks:
  reverseproxy-network:
    name: reverseproxy-network

sample-site-docker-compose.yml

##### How proxy a service
## 1. label: add filtering rule. See https://doc.traefik.io/traefik/v2.0/routing/providers/docker/
## 2. networks: set "reverseproxy-network" as its external network
version: '3'
services:
  app:
    image: nginx
    container_name: site1
    volumes:
      - ./index.html:/usr/share/nginx/html/index.html
    expose:
      - 80
    labels:
      - traefik.http.routers.site1.rule=Host(`seart-ghs.si.usi.ch`)
      # below line if this container is listening to specific port
      - traefik.http.services.site1-service.loadbalancer.server.port=80
      - traefik.docker.network=reverseproxy-network
    networks:
      - default
      - reverseproxy

networks:
  default:
    name: site1_default
  reverseproxy:
    external:
      name: reverseproxy-network