wip: Add build hello world workflow

.github/workflows/hello_world_build.yml

@@ -0,0 +1,38 @@
+name: "HelloWorld: Build"
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    types: [opened, reopened]
+
+jobs:
+  build-aab:
+    name: Build AAB
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+          flutter-version: 3.22.2
+      - run: |
+          dart ../../packages/flutter_distributor/bin/main.dart package \
+            --platform=android \
+            --targets aab
+        working-directory: examples/hello_world
+
+  build-apk:
+    name: Build APK
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+          flutter-version: 3.22.2
+      - run: |
+          dart ../../packages/flutter_distributor/bin/main.dart package \
+            --platform=android \
+            --targets apk
+        working-directory: examples/hello_world

examples/hello_world/distribute_options.yaml

@@ -1,6 +1,6 @@
 output: dist/
 variables:
-  FLUTTER_ROOT: ~/fvm/versions/3.16.5
+#  FLUTTER_ROOT: ~/fvm/versions/3.16.5
   # PGYER_API_KEY: your api key
 releases:
   - name: dev-profile