Reorganize mobile app building

.drone.yml

@@ -54,6 +54,9 @@ steps:
 
 - name: backend_build
   image: rust
+  when:
+    event:
+      - tag
   volumes:
   - name: rust_registry
     path: /usr/local/cargo/registry
@@ -72,20 +75,33 @@ steps:
   - ls -lah target/release/moneymgr_backend target/release/examples/api_curl
   - cp target/release/moneymgr_backend target/release/examples/api_curl /tmp/release
 
-# Mobile app
-- name: mobile_app
+# Mobile app code quality
+- name: mobile_app_code_quality
   image: ghcr.io/cirruslabs/flutter:latest
-  depends_on:
-  - backend_build
-  volumes:
-  - name: release
-    path: /tmp/release
   commands:
   - cd moneymgr_mobile
   - flutter --disable-analytics
   - flutter pub get --enforce-lockfile
   - dart run build_runner build
   - flutter analyze
+
+# Mobile app build
+- name: mobile_app_build
+  image: ghcr.io/cirruslabs/flutter:latest
+  depends_on:
+  - backend_build # prevent synchronous backend & frontend build
+  - mobile_app_code_quality
+  volumes:
+  - name: release
+    path: /tmp/release
+  when:
+    event:
+      - tag
+  commands:
+  - cd moneymgr_mobile
+  - flutter --disable-analytics
+  - flutter pub get --enforce-lockfile
+  - dart run build_runner build
   - flutter build apk
     --release
     --build-name $(git describe --tags --abbrev=0) 
@@ -94,12 +110,13 @@ steps:
   - cp build/app/outputs/flutter-apk/app-release.apk /tmp/release/moneymgr_mobile_arm64-v8a.apk
 
 
+
 # Release
 - name: gitea_release
   image: plugins/gitea-release
   depends_on:
   - backend_build
-  - mobile_app
+  - mobile_app_build
   when:
     event:
       - tag