ci: Update flutter-ci.yml

Author: phanatagama

.github/workflows/flutter-ci.yml

@@ -44,7 +44,36 @@ jobs:
     - run: flutter build apk
 
     # Upload generated apk to the artifacts.
-    - uses: actions/upload-artifact@v1
+    - uses: actions/upload-artifact@v3
       with:
         name: release-apk
         path: build/app/outputs/apk/release/app-release.apk
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: [build]
+    steps:
+      # 1
+      - uses: actions/checkout@v3
+      
+      - uses: actions/download-artifact@v3
+        with:
+          name: release-apk
+          path: build/app/outputs/apk/release/app-release.apk
+          
+      - name: Display structure of downloaded files
+        run: ls -R
+      # 2
+      - name: Generate release tag
+        id: tag
+        run: |
+          echo "::set-output name=release_tag::Flarax_$(date +"%Y.%m.%d_%H-%M")"
+      # 3
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ steps.tag.outputs.release_tag }}
+          files: build/app/outputs/apk/release/app-release.apk
+