bug: update build script with right gradle-wrapper.jar (#24)

* fix: add new gradle-wrapper.jar

* fix: add build script with fixed working dir

.github/workflows/discovery-dockerhub-push.yml

@@ -0,0 +1,38 @@
+name: Docker Hub Push
+
+on:
+  push:
+    branches:
+      - 'discovery/dev'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v2
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x src/discovery-service/gradlew
+
+      - name: Build with Gradle
+        run: |
+          cd src/discovery-service
+          ./gradlew clean build
+
+      - name: Build Dockerfile and Push Docker Image
+        env:
+          DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
+          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+        run: |
+          cd src/discovery-service
+          docker build -t $DOCKER_USERNAME/discovery-service:latest .
+          docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
+          docker push $DOCKER_USERNAME/discovery-service:latest
+