.github/workflows/deploy_web.yml

name: Deploy to web
on:
  workflow_dispatch:
    # Enable manual run
    inputs:
      environment:
        description: 'Environment to deploy to (staging OR prod)'
        required: true
        default: 'staging'
  push:
    # Sequence of patterns matched against refs/tags
    tags:
    - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10

jobs:
  build-and-deploy:
    runs-on: ubuntu-18.04
    steps:
    # Set up Flutter.
    - name: Clone Flutter repository with master channel
      uses: subosito/flutter-action@v1.5.0
      with:
        channel: master
    - run: flutter doctor -v

    - name: Install web dependencies
      uses: actions/setup-node@v1
      with:
        node-version: '14'
    - run: npm install -g firebase-tools

    # Checkout gallery code and get packages.
    - name: Checkout gallery code
      uses: actions/checkout@v2
    - run: flutter pub get

    # Build and deploy (by default, to staging).
    - run: flutter build -v web --release
    - run: firebase deploy -P ${{ github.event.inputs.environment || 'staging' }}
      env:
        FIREBASE_TOKEN: ${{ secrets.FIREBASE_TOKEN }}