update github actions workflow to publish artifacts to releases

.github/workflows/android.yml

@@ -1,16 +1,13 @@
 name: Android CI
 
-on:
+on: 
   push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
+    tags:
+    - '*'
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v2
     - name: set up JDK 11
@@ -21,5 +18,15 @@ jobs:
 
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
+
     - name: Build with Gradle
-      run: ./gradlew build
+      run: ./gradlew assembleDebug
+
+    - name: GH Release
+      uses: softprops/action-gh-release@v0.1.5
+      if: startsWith(github.ref, 'refs/tags/')
+      with:
+        files: app/build/outputs/apk/debug/app-debug.apk
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+