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>

.gitea/workflows/build-push.yaml

@@ -36,5 +36,5 @@ jobs:
           build-args: |
             NODEVER=${{ matrix.nodever }}
           tags: |
-            repo.anhonesthost.net/cloud-hosting-platform/cnc:node${{ matrix.nodever }}
-            ${{ matrix.nodever == '20' && 'repo.anhonesthost.net/cloud-hosting-platform/cnc:latest' || '' }}
+            repo.anhonesthost.net/cloud-hosting-platform/cnoc:node${{ matrix.nodever }}
+            ${{ matrix.nodever == '20' && 'repo.anhonesthost.net/cloud-hosting-platform/cnoc:latest' || '' }}