ci: add gitea image publishing workflows

.gitea/workflows/build-snapshot.yaml

@@ -0,0 +1,111 @@
+name: Snapshot Docker Image Build
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  verify-and-package:
+    if: github.repository != 'templates/mono-app-with-db'
+    runs-on: java-node-24
+    env:
+      GRADLE_USER_HOME: /opt/hostedtoolcache/gradle/${{ github.repository }}
+
+    steps:
+      - name: 1. Checkout repository
+        uses: actions/checkout@v4
+
+      - name: 2. Prepare Gradle cache and Docker access
+        run: |
+          sudo install -d -m 0755 -o "$(id -u)" -g "$(id -g)" "$GRADLE_USER_HOME"
+          sudo chgrp "$(id -g)" /var/run/docker.sock
+          sudo chmod g+rw /var/run/docker.sock
+
+      - name: 3. Verify and stage with Gradle
+        run: |
+          ./gradlew --no-daemon --console=plain check stageFatJar
+
+      - name: 4. Upload test reports
+        if: always()
+        id: upload-test-reports
+        uses: christopherhx/gitea-upload-artifact@v4
+        with:
+          name: test-reports
+          path: |
+            build/reports/tests/test/**
+            build/test-results/test/**/*.xml
+          if-no-files-found: warn
+          retention-days: 7
+
+      - name: 5. Output test report artifact URL
+        if: always()
+        run: |
+          echo "Test reports: ${{ steps.upload-test-reports.outputs.artifact-url }}"
+
+      - name: 6. Upload staged fat jar
+        uses: christopherhx/gitea-upload-artifact@v4
+        with:
+          name: application-fat-jar
+          path: build/ci/server.jar
+          retention-days: 1
+          compression-level: 0
+
+  build-and-publish-snapshot:
+    if: github.repository != 'templates/mono-app-with-db'
+    runs-on: java-node-24
+    needs: verify-and-package
+    env:
+      REGISTRY: git.dslan.at
+      REPOSITORY: ${{ github.repository }}
+
+    steps:
+      - name: 1. Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: 2. Download staged fat jar
+        uses: christopherhx/gitea-download-artifact@v4
+        with:
+          name: application-fat-jar
+          path: ./build/ci
+
+      - name: 3. Prepare Docker access
+        run: |
+          sudo chgrp "$(id -g)" /var/run/docker.sock
+          sudo chmod g+rw /var/run/docker.sock
+
+      - name: 4. Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3.11.0
+        with:
+          driver: docker-container
+          driver-opts: network=host
+
+      - name: 5. Read version and set snapshot tag
+        id: meta
+        run: |
+          VERSION_BASE=$(cat VERSION)
+          LAST_CHANGED=$(git log -1 --format=%H VERSION)
+          COUNT=$(git rev-list ${LAST_CHANGED}..HEAD --count)
+          SNAPSHOT_TAG="${VERSION_BASE}-SNAPSHOT-$((COUNT + 1))"
+          echo "tag_version=$SNAPSHOT_TAG" >> $GITHUB_OUTPUT
+
+      - name: 6. Log in to the Gitea Container Registry
+        uses: docker/login-action@v3.6.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ secrets.PR_USER }}
+          password: ${{ secrets.PR_PASSWORD }}
+
+      - name: 7. Build and push the Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./build/ci
+          file: ./Dockerfile
+          push: true
+          tags: |
+            ${{ env.REGISTRY }}/${{ env.REPOSITORY }}:${{ steps.meta.outputs.tag_version }}
+            ${{ env.REGISTRY }}/${{ env.REPOSITORY }}:snapshot-latest
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.REPOSITORY }}:buildcache-snapshot
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.REPOSITORY }}:buildcache-snapshot,mode=max