Setup a release workflow

.github/workflows/release.yml

@@ -0,0 +1,51 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  release:
+    runs-on: [ubuntu-latest]
+
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v2
+
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Generate a Cache Key
+        run: ./checksum.sh checksum.txt
+
+      - name: Copy CI Gradle Properties
+        run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
+
+      - name: Cache Gradle Folders
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+          key: ${{ runner.os }}-gradle-${{ hashFiles('checksum.txt') }}
+
+      - name: Build Debug APK
+        run: ./gradlew assembleDebug
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: true
+          prerelease: false
+          files: |
+            app/build/outputs/apk/debug/app-arm64-v8a-debug.apk
+            app/build/outputs/apk/debug/app-armeabi-v7a-debug.apk
+            app/build/outputs/apk/debug/app-x86_64-debug.apk
+            app/build/outputs/apk/debug/app-x86-debug.apk