ci: add site pipeline

.gitea/workflows/site.yaml

@@ -0,0 +1,30 @@
+name: site
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check file references and external requests
+        run: python3 tools/check_site.py
+
+  build:
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check tooling
+        run: docker version --format '{{.Server.Version}}' && docker compose version
+      - name: Build image
+        run: docker build -t rezayaghobi-site:${GITHUB_SHA::7} .
+      - name: Validate nginx config
+        run: docker run --rm rezayaghobi-site:${GITHUB_SHA::7} nginx -t
+      - name: Check site files are in the image
+        run: |
+          docker run --rm --entrypoint sh rezayaghobi-site:${GITHUB_SHA::7} \
+            -c 'test -f /usr/share/nginx/html/index.html && test -d /usr/share/nginx/html/assets'