Initial attempt at app build

.github/workflows/android.yml

@@ -0,0 +1,28 @@
+name: Build App
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: set up JDK
+      uses: actions/setup-java@v4
+      with:
+        java-version: '8'
+        distribution: 'corretto'
+        cache: gradle
+
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+
+    - name: Build with Gradle
+      run: ./gradlew build