add upload to release

Author: DmitriyLewen

.github/workflows/buildapp.yml

@@ -12,6 +12,7 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
+
       - name: Create Release
         id: create_release
         uses: actions/create-release@v1
@@ -26,9 +27,19 @@ jobs:
             - Second Change
           draft: false
           prerelease: false
+
       - name: Set Up flutter
         uses: subosito/flutter-action@v1
+
       - name: Get dependencies
         run: flutter pub get
+
       - name: Build app
         run: flutter build apk --release
+
+      - name: Upload to release
+        uses: JasonEtco/upload-to-release@master
+        with:
+          args: app-release.apk
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}