Change container name from cnc to cnoc to avoid nginx container conflict

- Update Gitea pipeline to build cnoc:node18, cnoc:node20, cnoc:node22
- Update local-dev.sh to use cnoc container from registry
- Update documentation references from CNC to CNOC
- Update default app package name to cnoc-default-app
- Avoid conflict with existing nginx container (cnc)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

configs/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "cloud-node-container",
+  "name": "cnoc-default-app",
   "version": "1.0.0",
   "description": "Default Node.js application for Cloud Node Container",
   "main": "index.js",