🔨 Update github action workflow

.github/workflows/nightly.yml

@@ -17,6 +17,11 @@ jobs:
           cache: true
       - run: flutter pub get
       - run: flutter build web
+      - name: Archive production artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-output-web
+          path: build/web
   build-apk:
     runs-on: ubuntu-latest
     steps:
@@ -29,6 +34,11 @@ jobs:
           cache: true
       - run: flutter pub get
       - run: flutter build apk --split-per-abi
+      - name: Archive production artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-output-android
+          path: build/app/outputs/flutter-apk/*.apk
   build-exe:
     runs-on: windows-latest
     steps:
@@ -40,4 +50,10 @@ jobs:
           channel: stable
           cache: true
       - run: flutter pub get
-      - run: flutter build window
+      - run: flutter build windows
+      - name: Archive production artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-output-windows
+          path: build/windows
+