try simple build

apps/mobile/.github/workflows/main.yml

@@ -5,42 +5,21 @@ on: [push]
 jobs:
   build:
     runs-on: ubuntu-20.04
-    timeout-minutes: 15
-
     steps:
     - uses: actions/checkout@v2
+    - name: Use Node.js v12
+      uses: actions/setup-node@v1
       with:
-        persist-credentials: false
+        node-version: 12.x
 
-    - uses: joschi/setup-jdk@v2
-      with:
-        java-version: '8'
-    - name: Use Node.js v14
-      uses: actions/setup-node@v2.1.5
-      with:
-        node-version: 14.x
-        
-    - name: Install node_modules
-      run: |
-        yarn
-
-    - name: Download Android Emulator Image
-      run: |
-        echo "y" | $ANDROID_HOME/tools/bin/sdkmanager --install "system-images;android-29;google_apis;x86"
-        echo "no" | $ANDROID_HOME/tools/bin/avdmanager create avd --force --name emu --device "Nexus 5X" -k 'system-images;android-29;google_apis;x86'
-        $ANDROID_HOME/emulator/emulator -list-avds
-
-    - name: Build for detox
-      run: |
-        yarn build-detox-android
-    - name: Android Emulator
-      timeout-minutes: 10
-      continue-on-error: true
-      run: |
-        echo "Starting emulator"
-        nohup $ANDROID_HOME/emulator/emulator -avd emu -no-audio -no-snapshot -no-window &
-        $ANDROID_HOME/platform-tools/adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed | tr -d '\r') ]]; do sleep 1; done; input keyevent 82'
-        $ANDROID_HOME/platform-tools/adb devices
-        echo "Emulator started"
-    - name: Android Detox
-      run: yarn start & yarn test-detox-android
+    - run: yarn
+      working-directory: example
+      name: Installing node modules
+    
+    - run: ./gradlew assembleDebug -Dorg.gradle.logging.level=info
+      working-directory: example/android
+      name: Build Android apk (debug)
+      
+    - run: ./gradlew assembleRelease -Dorg.gradle.logging.level=info
+      working-directory: example/android
+      name: Build Android apk (release)