release workflow

.github/workflows/release.yml

@@ -0,0 +1,43 @@
+name: Build and upload assets
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v4
+
+      - name: Install Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+
+      - name: set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+
+      - name: install dependencies
+        run: flutter pub get
+
+      - name: generate runtime code
+        run: dart run build_runner build --delete-conflicting-outputs
+
+      - name: build
+        run: flutter build apk
+
+      - name: rename output APK
+        run: |
+          mkdir bin
+          mv build/app/outputs/flutter-apk/app-release.apk bin/karlsen-mobile-${{ github.event.release.tag_name }}.apk
+          
+      - name: Upload release assets
+        uses: softprops/action-gh-release@v2
+        with:
+          files: bin/*.apk