feat: Add Gitea pipelines for frontend and backend

.gitea/workflows/backend.yaml

@@ -0,0 +1,99 @@
+name: Backend CI/CD
+run-name: ${{ gitea.actor }} triggered backend pipeline on ${{ gitea.ref_name }}
+
+on:
+  pull_request:
+    paths:
+      - 'legalconsenthub-backend/**'
+      - '.gitea/workflows/backend.yaml'
+  push:
+    branches:
+      - main
+    paths:
+      - 'legalconsenthub-backend/**'
+      - '.gitea/workflows/backend.yaml'
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./legalconsenthub-backend
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+
+      - name: Setup Gradle cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+            legalconsenthub-backend/.gradle
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - name: Make gradlew executable
+        run: chmod +x gradlew
+
+      - name: Build application
+        run: ./gradlew build -x test
+
+      - name: Run ktlint check
+        run: ./gradlew ktlintCheck
+
+      - name: Run tests with Testcontainers
+        run: ./gradlew test
+        env:
+          SPRING_PROFILES_ACTIVE: testcontainers
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to Gitea Container Registry
+        if: gitea.event_name == 'push' && gitea.ref == 'refs/heads/main'
+        uses: docker/login-action@v3
+        with:
+          registry: gitea.lugnas.de
+          username: ${{ gitea.actor }}
+          password: ${{ gitea.token }}
+
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: gitea.lugnas.de/${{ gitea.repository_owner }}/legalconsenthub-backend
+          tags: |
+            type=raw,value=latest,enable=${{ gitea.ref == 'refs/heads/main' }}
+            type=sha,prefix=,format=long
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./legalconsenthub-backend
+          push: ${{ gitea.event_name == 'push' && gitea.ref == 'refs/heads/main' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Image built successfully
+        if: gitea.event_name == 'push' && gitea.ref == 'refs/heads/main'
+        run: |
+          echo "✅ Docker image built and pushed successfully"
+          echo "📦 Image: gitea.lugnas.de/${{ gitea.repository_owner }}/legalconsenthub-backend:latest"
+          echo "📦 Image: gitea.lugnas.de/${{ gitea.repository_owner }}/legalconsenthub-backend:${{ gitea.sha }}"
+
+      - name: Dry-run completed
+        if: gitea.event_name == 'pull_request'
+        run: |
+          echo "✅ Dry-run build completed successfully (image not pushed)"
+