release app on github

the release can be further customized with the provided actions
References synyx#43

.github/workflows/android.yml

@@ -5,13 +5,15 @@ on: [push, pull_request]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: set up JDK 11
-      uses: actions/setup-java@v1
+      uses: actions/setup-java@v3
       with:
         java-version: 11
+        distribution: 'temurin'
+        cache: 'gradle''
     - name: Build with Gradle
       run: ./gradlew build

.github/workflows/release.yml

@@ -0,0 +1,33 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  release:
+    runs-on: ubuntu-22.04
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: 11
+          distribution: 'temurin'
+          cache: 'gradle'
+      - name: Build with Gradle
+        run: ./gradlew buildRelease
+      - name: Sign app
+        uses: ilharp/sign-android-release@v1
+        id: sign_app
+        with:
+          keyAlias: ${{ secrets.ANDROID_KEY_ALIAS }}
+          keyPassword: ${{ secrets.ANDROID_KEY_PASSWORD }}
+          keyStorePassword: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          signingKey: ${{ secrets.ANDROID_SIGNING_KEY }}
+      - name: Create Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: ${{steps.sign_app.outputs.signedFile}}