chore: setup cd pipelines (#32)

.github/workflows/release_staging.yml

@@ -0,0 +1,43 @@
+# This is a lint and test workflow for Flutter CI
+
+name: Relase Staging
+
+# on:
+#   push:
+#     branches:
+#       - develop
+#   pull_request:
+#     branches:
+#       - develop
+on:
+  pull_request:
+jobs:
+  build_ios:
+    name: Build Flutter (ios)
+    runs-on: ubuntu-latest
+    steps:
+      # Setup Java environment in order to build the Android app.
+      - uses: actions/[email protected]
+      - uses: actions/setup-java@v1
+        with:
+          java-version: '12.x'
+
+      # Setup the Flutter environment.
+      - uses: subosito/flutter-action@v1
+        with:
+          channel: 'stable' # 'dev', 'alpha', default to: 'stable'
+          # flutter-version: '1.12.x' # uncomment this to specify the exact version of Flutter
+
+      - name: Get Flutter dependencies.
+        run: flutter pub get
+
+      - name: Build ios app
+        run: flutter build ios --flavor staging -t lib/main-staging.dart --no-codesign
+
+      - name: Upload Firebase App Distribution
+        uses: wzieba/Firebase-Distribution-Github-Action@v1
+        with:
+          appId: ${{secrets.FIREBASE_IOS_APP_ID}}
+          token: ${{secrets.FIREBASE_TOKEN}}
+          groups: testers
+          file: build/ios/iphoneos