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>

Dockerfile

@@ -0,0 +1,9 @@
+FROM nginx:1.27-alpine
+
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY public/ /usr/share/nginx/html/
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s \
+  CMD wget -q -O - http://127.0.0.1:8080/ >/dev/null || exit 1