A docker-compose config in v3 format for nginx-proxy with separate containers for nginx, dockergen and letsencrypt-companion. Additional example on how to get GitLab docker container running with this nginx-proxy setup. You need to create the docker network before, just run 'docker network create nginx-proxy'. Docker will tell you so if you don'…

docker-compose-gitlab.yml

version: '3'
services:
  web:
    image: 'gitlab/gitlab-ce:latest'
    restart: always
    hostname: 'gitlab.example.com'
    environment:
      GITLAB_OMNIBUS_CONFIG: |
        external_url 'https://gitlab.example.com'
        nginx['listen_port'] = 80
        nginx['listen_https'] = false
        nginx['proxy_set_headers'] = {
          "X-Forwarded-Proto" => "https",
          "X-Forwarded-Ssl" => "on"
        }
      VIRTUAL_HOST: gitlab.example.com
      LETSENCRYPT_HOST: gitlab.example.com
      LETSENCRYPT_EMAIL: email@example.com
    volumes:
      - '/srv/dockerdata/gitlab/config:/etc/gitlab'
      - '/srv/dockerdata/gitlab/logs:/var/log/gitlab'
      - '/srv/dockerdata/gitlab/data:/var/opt/gitlab'

networks:
  default:
    external:
      name: nginx-proxy

docker-compose.yml

version: '3'
services:
  nginx:
    image: nginx
    container_name: nginx
    ports:
      - '80:80'
      - '443:443'
    volumes:
      - 'nginx-config:/etc/nginx/conf.d'
      - 'nginx-certs:/etc/nginx/certs'
      - 'nginx-vhosts:/etc/nginx/vhost.d'
      - 'nginx-webroot:/usr/share/nginx/html'

  dockergen:
    image: jwilder/docker-gen
    container_name: nginx-docker-gen
    command: -notify-sighup nginx -watch /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf
    volumes:
      - 'nginx-config:/etc/nginx/conf.d'
      - 'nginx-certs:/etc/nginx/certs'
      - 'nginx-vhosts:/etc/nginx/vhost.d'
      - 'nginx-webroot:/usr/share/nginx/html'
      - '/var/run/docker.sock:/tmp/docker.sock:ro'
      - './nginx.tmpl:/etc/docker-gen/templates/nginx.tmpl'

  letsencrypt:
    image: jrcs/letsencrypt-nginx-proxy-companion
    environment:
      NGINX_DOCKER_GEN_CONTAINER: nginx-docker-gen
    volumes:
      - 'nginx-config:/etc/nginx/conf.d'
      - 'nginx-certs:/etc/nginx/certs'
      - 'nginx-vhosts:/etc/nginx/vhost.d'
      - 'nginx-webroot:/usr/share/nginx/html'
      - '/var/run/docker.sock:/var/run/docker.sock:ro'

volumes:
  nginx-config:
  nginx-certs:
  nginx-vhosts:
  nginx-webroot:

networks:
  default:
    external:
      name: nginx-proxy