feat: update docker and pipeline

- Add workflow to publish to GHCR
- Add workflow to build Docker image
- Add zap2xmlrc config example
- Update Dockerfile to run continuously

.github/workflows/ci.yaml

@@ -0,0 +1,14 @@
+name: Continuous Integration
+on:
+  pull_request:
+    branches:
+      - main
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Build service
+        run: docker build .