android app release build with sign

main.yml

name: assembleRelease

on:
  create:
    tags:
      - v*

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Install JDK 1.8
      uses: actions/setup-java@v1.3.0
      with:
          java-version: 1.8
    - run: echo $SIGNING_KEY | base64 -d > app/keystore/jellycrew.jks
      env:
        SIGNING_KEY: ${{ secrets.SIGNING_KEY }}
    - name: Build release APK
      run: bash ./gradlew :app:assembleRelease
      env:
        KEY_STORE_PASSWORD: ${{ secrets.KEY_STORE_PASSWORD }}
        KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
        ALIAS: ${{ secrets.ALIAS }}
    - name: Upload apk
      uses: actions/upload-artifact@v1.0.0
      with:
          name: apk
          path: app/build/outputs/apk/release/app-release.apk
    - name: Upload mapping.txt
      uses: actions/upload-artifact@v1.0.0
      with:
          name: mapping
          path: app/build/outputs/mapping/release/mapping.txt