docs: add demo overview

README.md

@@ -1,3 +1,15 @@
-# demo-platform
+# Gitea VPS Demo
 
-Gitea VPS deployment demo with Issues, Pull Requests, Wiki, Packages, and Actions enabled.
+This repository was created automatically on the DigitalOcean Droplet deployment.
+
+Enabled platform capabilities:
+
+- Repository management
+- Pull requests and code review
+- Issues
+- Wiki support
+- Gitea Actions / CI
+- Packages and container registry support
+- Admin system
+
+AI code review can be added as a workflow that calls an LLM API and comments on pull requests.