fix(devcontainer): Make config-ui dev server accessible outside the container

when started by listening on 0.0.0.0 with the `--host` flag.
Also ensure it uses port 4000 or fails to start with `--strictPort`
to prevent silent port change that will mismatch with the exported dev container port.

Author: amnir

config-ui/vite.config.ts

@@ -21,7 +21,7 @@ import { defineConfig } from 'vite';
 import react from '@vitejs/plugin-react';
 import svgr from 'vite-plugin-svgr';
 
-// Allow Grafana access from the dev server when using dev container 
+// Allow Grafana access from the dev server when using Dev Container 
 const grafanaOrigin = process.env.VITE_GRAFANA_URL || 'http://localhost:3002';
 const grafanaChangeOrigin = envBool('VITE_GRAFANA_CHANGE_ORIGIN', true);