Add GitHub Actions workflow for building release APK

Author: DP-Hridayan

.github/workflows/build_release.yml

@@ -0,0 +1,50 @@
+name: Build Release APK
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build Release APK
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          submodules: recursive
+          fetch-depth: 0
+
+      - name: Set up Java
+        uses: actions/setup-java@v5
+        with:
+          distribution: temurin
+          java-version: '17'
+
+      - name: Set up Android SDK
+        uses: android-actions/setup-android@v4
+
+      - name: Grant execute permission to Gradle
+        run: chmod +x ./gradlew
+
+      - name: Decode Keystore
+        env:
+          KEYSTORE_BASE64: ${{ secrets.KEYSTORE_BASE64 }}
+        run: |
+          echo "$KEYSTORE_BASE64" | base64 --decode > keystore.jks
+
+      - name: Set Environment Variables
+        run: |
+          echo "KEYSTORE_PATH=$PWD/keystore.jks" >> $GITHUB_ENV
+          echo "KEYSTORE_PASSWORD=${{ secrets.KEYSTORE_PASSWORD }}" >> $GITHUB_ENV
+          echo "KEY_ALIAS=${{ secrets.KEY_ALIAS }}" >> $GITHUB_ENV
+          echo "KEY_PASSWORD=${{ secrets.KEY_PASSWORD }}" >> $GITHUB_ENV
+
+      - name: Build Release APK
+        run: ./gradlew assembleGithubRelease
+
+      - name: Upload Release APK
+        uses: actions/upload-artifact@v7
+        with:
+          name: release-apk
+          path: app/build/outputs/apk/github/release/*.apk