Auto build Flutter Android app after push and make release

build.yml

name: Auto-Build

on:
  push:
    branches:
      - main

permissions:
  contents: write

jobs:
  build-android:
    name: Android Build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - uses: subosito/flutter-action@v2
        with:
          channel: 'stable'
          architecture: x64
      - run: flutter pub get

      - run: flutter build apk --release

      - name: Calculate Version
        id: version
        run: echo "VERSION=v$((${{ github.run_number }} / 10)).$((${{ github.run_number }} % 10))" >> $GITHUB_ENV

      - name: Upload Android APK to release
        uses: svenstaro/upload-release-action@v2
        with:
          repo_token: ${{ secrets.GITHUB_TOKEN }}
          file: build/app/outputs/flutter-apk/app-release.apk
          tag: "${{ env.VERSION }}"
          overwrite: true
          body: "Реліз версії ${{ env.VERSION }} для ${{ github.repository }}."