Sample gitlab CI file for deploying a `create-react-app` application to firebase.

.gitlab-ci.yml

image: node:6.11.3

cache:
  key: cache_yarn
  paths:
    - .cache_yarn

stages:
  - install
  - build
  - test
  - deploy

install_functions:
  stage: install
  script:
    - cd ./functions && yarn install --cache-folder ../.cache_yarn
  only:
    - staging
    - production
  artifacts:
    paths:
      - functions/node_modules

install_client:
  stage: install
  script:
    - cd ./client && yarn install --cache-folder ../.cache_yarn
  only:
    - staging
    - production
  artifacts:
    paths:
      - client/node_modules

build_client:
  stage: build
  script:
    - cd ./client && yarn build
  only:
    - staging
    - production
  dependencies:
    - install_client
  artifacts:
    paths:
      - client/build

test_client:
  stage: test
  script:
    - cd ./client && yarn test
  only:
    - staging
    - production
  dependencies:
    - install_client

deploy_all_staging:
  stage: deploy
  script:
    - yarn global add firebase-tools --cache-folder ../.cache_yarn
    - firebase --token $FIREBASE_DEPLOY_KEY_STAGING --project staging deploy
  only:
    - staging
  environment:
    name: staging
  dependencies:
    - install_functions
    - build_client

deploy_all_production:
  stage: deploy
  script:
    - yarn global add firebase-tools --cache-folder ../.cache_yarn
    - firebase --token $FIREBASE_DEPLOY_KEY_PRODUCTION --project production deploy 
  only:
    - production
  environment:
    name: production
  dependencies:
    - install_functions
    - build_client