[ADD] build app job

.github/workflows/build_app.yml

@@ -0,0 +1,43 @@
+name: Build_App
+
+on:
+  workflow_call:
+
+jobs:
+
+## Build App ##
+
+  Build_Front:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./front
+    environment: Staging
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install Yarn
+        run: npm install -g yarn
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: 🏗 Setup Expo
+        uses: expo/expo-github-action@v7
+        with:
+          expo-version: latest
+          eas-version: 3.3.1
+          token: ${{ secrets.EXPO_TOKEN }}
+
+      - name: Build Android APK
+        run: |
+          eas build -p android --profile debug --local --non-interactive
+          mv *.apk chromacase.apk
+
+      - name: Upload Artifact
+        if: github.ref == 'refs/heads/main'
+        uses: actions/upload-artifact@v3
+        with:
+          name: chromacase.apk
+          path: front/