ci: build and upload apk

.github/workflows/release.yml

@@ -0,0 +1,29 @@
+name: ci
+
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          java-version: "17"
+          distribution: "temurin"
+          cache: gradle
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+      - name: Build with Gradle
+        run: ./gradlew assembleRelease
+      - name: Upload the apk to artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          path: app/build/outputs/apk/release/app-release.apk