drone:
  image: drone/drone:1.5-linux-amd64
  ports:
    - "8080:80"
  volumes:
    - ./data:/data
  environment:
    - DRONE_AGENTS_ENABLED=true
    - DRONE_SERVER_PROTO=http
    - DRONE_SERVER_HOST=drone.easypi.pro
    - DRONE_RPC_SECRET=secret
    - DRONE_GITHUB_SERVER=https://github.com
    - DRONE_GITHUB_CLIENT_ID=xxxxxx
    - DRONE_GITHUB_CLIENT_SECRET=xxxxxx
  restart: always

#
# Github » Settings » Applications » Developer applications » Register new application
#
Application name: drone
Homepage URL: http://drone.easypi.pro/
Application description: Drone is a Continuous Integration platform built on Docker, written in Go
Authorization callback URL: http://drone.easypi.pro/authorize
Client ID: ... (generated by github)
Client Secret: ... (generated by github)

Drone will register gogs webhooks automatically, you don't need to do it manually.

nginx/sites-enabled/drone

server {
    listen 80;
    server_name drone.easypi.pro;
    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header Origin "";

        proxy_pass http://127.0.0.1:8080;
        proxy_redirect off;
        proxy_http_version 1.1;
        proxy_buffering off;

        chunked_transfer_encoding off;
    }
}

up and running

# server
$ cd ~/fig/drone/
$ docker-compose up -d
$ docker-compose logs -f

# client (login with remote driver credential)
$ firefox http://drone.easypi.pro/