Build CI: Trigger when have a PR merged to staging branch

.github/workflows/main.yaml

@@ -0,0 +1,31 @@
+name: Run test
+on:
+  pull_request:
+    branches:
+      - staging
+jobs:
+  if_merged:
+    if: github.event.pull_request.merged == true
+    name: Test on iOS simulator
+    runs-on: macOS-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4.1.1
+      - name: Java setup
+        uses: actions/setup-java@v4.0.0
+        with:
+          java-version: '17'
+          distribution: 'zulu'
+      - name: Flutter setup
+        uses: subosito/flutter-action@v2.12.0
+        with:
+          channel: 'stable'
+      - name: Create iOS simulator
+        uses: futureware-tech/simulator-action@v3
+        with:
+          model: 'iPhone 14'
+      - run: flutter doctor -v
+      - run: flutter pub get
+      - run: flutter pub run build_runner build --delete-conflicting-outputs
+      - run: flutter test --flavor=dev
+      - run: flutter test integration_test --flavor=dev

README.md

@@ -1,2 +1,2 @@
 ## The Flutter project integrate CI-CD
-Todo ...
+![Flutter CI-CD demo](https://github.com/ntaworking/flutter_ci_cd/actions/workflows/main.yml/badge.svg)