Init Astro site with Docker and AI workflows

- Add landing page and base layout with cozy theme
- Configure Astro, TypeScript, and project settings
- Add Dockerfile, Nginx config, and docker-compose
- Include favicon and site metadata
- Add documentation: README, DEVELOPMENT, PROJECT_CONTEXT, TODO, CLAUDE
- Add Gitea workflows for AI chat, PR review, issue triage, and codebase
  review

docker-compose.yml

@@ -0,0 +1,11 @@
+version: '3.8'
+
+services:
+  cozy-den:
+    build: .
+    container_name: cozy-den
+    ports:
+      - "3000:80"
+    restart: unless-stopped
+    environment:
+      - NODE_ENV=production