Update workflow

.github/workflows/gradle.yml

@@ -1,26 +1,23 @@
-# This workflow will build a Java project with Gradle
-# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
-
 name: Java CI with Gradle
 
 on:
-  pull_request:
-    branches: [main]
+  push:
+    branches: [dev]
 
 jobs:
   build:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up JDK 19
-        uses: actions/setup-java@v2
+      - uses: actions/checkout@v4
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
         with:
-          java-version: "19"
+          java-version: "21"
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@e6e38bacfdf1a337459f332974bb2327a31aaf4b
       - name: Testing
-        working-directory: ./backend
+        working-directory: ./APP
         run: ./gradlew test
       - name: Cleanup Gradle Cache
         # Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.