cotech-website/docker-compose.yml

---
version: '3'
services:

  web:
    build: docker/web
    volumes:
      - site:/usr/local/apache2/htdocs/
      - ./docker/web/httpd.conf:/usr/local/apache2/conf/httpd.conf
    ports:
      - "4000:80"

  jekyll:
    image: ruby:2.5.3
    command: >
      sh -c '
        cd /src &&
        bundle --path /vendor &&
        bundle exec jekyll build --destination /site --watch
      '
    volumes:
      - .:/src
      - site:/site
      - vendor:/vendor

volumes:
  vendor:
  site: