feat: Initial Porkbun DNS MCP Light server

- 3 specific tools: ping, list_domains, list_dns_records
- 1 pass-through tool: porkbun_api for full API access
- Safety system with READ/WRITE/INFRA access levels
- Embedded API documentation as MCP resource
- Starlette wrapper with /health endpoint
- Gitea Actions CI workflow for Docker build

.gitea/workflows/build.yaml

@@ -0,0 +1,35 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: docker
+    container:
+      image: catthehacker/ubuntu:act-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: gitea.ext.ben.io
+          username: b3nw
+          password: ${{ secrets.CR_PAT }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: |
+            gitea.ext.ben.io/b3nw/porkbun-dns-mcp:latest
+            gitea.ext.ben.io/b3nw/porkbun-dns-mcp:${{ github.sha }}