version: '3.0' services: app: &app build: &app-build context: . dockerfile: Dockerfile.development volumes: - vendor:/vendor - home:/home/ruby ruby-2-3: <<: *app build: <<: *app-build args: RUBY_VERSION: 2.3.5 ruby-2-2: <<: *app build: <<: *app-build args: RUBY_VERSION: 2.2.8 node: build: context: . dockerfile: Dockerfile-node.development volumes: - vendor:/vendor - home:/home/node volumes: vendor: home: