docker-compose.yml

services:
  # Replicates the prod setup, in which puma serves the file built by jekyll + the assets
  web:
    build: .
    ports:
      - 4304:4304
    volumes:
      - ./:/usr/src/app
    environment:
      BUNDLE_PATH: "/usr/src/app/vendor/.bundle"
      JEKYLL_ENV: "development"
    command: bundle exec puma -C config/puma.rb
  # Jekyll server+watcher. Can be accessed directly or through the puma process.
  jekyll:
    build: .
    ports:
      - 4300:4300
      - 4302:4302
    volumes:
      - ./:/usr/src/app
    environment:
      BUNDLE_PATH: "/usr/src/app/vendor/.bundle"
      JEKYLL_ENV: "development"
    command: bundle exec jekyll serve --watch --host 0.0.0.0 --port 4300 --trace --incremental --livereload --livereload-port 4302
  # Assets (JS + CSS) building
  assets:
    build: .
    volumes:
      - ./:/usr/src/app
    command: yarn build --verbose  --watch
    environment:
      NODE_ENV: "development"