Initial scaffold: static site served by nginx on :8080

- public/index.html served via nginx.conf (port 8080)
- Dockerfile: nginx:1.27-alpine + HEALTHCHECK
- .gitea/workflows/flow.yml: build + push to Gitea registry, rolling deploy
- stack.yml: Swarm service wired to Traefik (host testwebsite.dev.serso.org)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,7 @@
+.git
+.gitea
+.gitignore
+.dockerignore
+stack.yml
+README.md
+*.md