ci: add GitHub Actions steps to build and upload debug APKs (#6)

Author: alluhemanth

.github/workflows/android.yml

@@ -0,0 +1,59 @@
+name: Android CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build APK
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: Create local.properties from secrets
+        run: |
+          echo "sdk.dir=/usr/local/lib/android/sdk" >> local.properties
+          echo "SUPABASE_URL=${{ secrets.SUPABASE_URL }}" >> local.properties
+          echo "SUPABASE_API_KEY=${{ secrets.SUPABASE_API_KEY }}" >> local.properties
+          echo "API_URL=${{ secrets.API_URL }}" >> local.properties
+
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x ./gradlew
+
+      - name: Build Debug APK
+        run: ./gradlew assembleDebug
+
+      - name: Upload F-droid APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-fdroid-debug.apk
+          path: app/build/outputs/apk/fdroid/debug/app-fdroid-debug.apk
+
+      - name: Upload Play APK
+        uses: actions/upload-artifact@v4
+        with:
+          name: app-play-debug.apk
+          path: app/build/outputs/apk/play/debug/app-play-debug.apk