Add deployment pipeline, Dockerfile, Nomad spec and tests

- Dockerfile: python:3.12-slim + gunicorn, dynamic port, BUILD_VERSION args
- punktfri.nomad: Traefik routing for punktfri.i80.dk, host volume for SQLite
- .gitea/workflows/deploy.yml: build/push to Harbor, deploy to Nomad
- Makefile: install/run/test/build targets
- tests/test_app.py: 9 pytest tests covering all routes and validation
- requirements.txt: add gunicorn
- requirements-dev.txt: pytest
- app.py: health endpoint returns version/commit info

.gitea/workflows/deploy.yml

@@ -0,0 +1,69 @@
+name: Build and Deploy PunktFri
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build-and-deploy:
+    runs-on: debian-host
+
+    env:
+      PATH: /usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/sbin:/bin:/snap/bin
+      DOCKER_HOST: unix:///var/run/docker.sock
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Verify Docker
+      run: docker --version
+
+    - name: Log in to Harbor Registry
+      run: |
+        echo "${{ secrets.HARBOR_ROBOT_TOKEN }}" | docker login registry.i80.dk -u "robot\$gitserver" --password-stdin
+
+    - name: Build and push Docker image
+      run: |
+        docker build \
+          --build-arg BUILD_VERSION=${{ github.ref_name }}-${{ github.sha }} \
+          --build-arg GIT_COMMIT=${{ github.sha }} \
+          --build-arg BUILD_TIME=${{ github.event.head_commit.timestamp }} \
+          -t registry.i80.dk/gitea/punktfri:latest \
+          -t registry.i80.dk/gitea/punktfri:${{ github.sha }} \
+          -f ./Dockerfile \
+          .
+        docker push registry.i80.dk/gitea/punktfri:latest
+        docker push registry.i80.dk/gitea/punktfri:${{ github.sha }}
+
+    - name: Validate Nomad job
+      run: nomad job validate punktfri.nomad
+      env:
+        NOMAD_ADDR: "https://nomad.i80.dk:4646"
+
+    - name: Deploy to Nomad
+      run: nomad job run punktfri.nomad
+      env:
+        NOMAD_ADDR: "https://nomad.i80.dk:4646"
+
+    - name: Wait for deployment
+      run: |
+        sleep 15
+        nomad job status punktfri
+        echo "=== Allocations ==="
+        nomad job allocs punktfri
+      env:
+        NOMAD_ADDR: "https://nomad.i80.dk:4646"
+
+    - name: Health check
+      run: |
+        sleep 20
+        curl -f https://punktfri.i80.dk/health || echo "Service not yet available"
+
+    - name: Notify deployment status
+      run: |
+        echo "Deployment completed!"
+        echo "Service: https://punktfri.i80.dk"
+        echo "Health:  https://punktfri.i80.dk/health"