Docker: Runtime-Config via window.__RMM_CONFIG__ (kein Rebuild bei Backend-Wechsel)

- Dockerfile: multistage build (node -> nginx)
- docker-entrypoint.sh: injiziert BACKEND_HOST/PORT zur Laufzeit
- nginx.conf: SPA-Routing, config.js no-cache
- index.html: laedt /config.js vor dem React-Bundle

Usage: docker run -e BACKEND_HOST=rmm.example.com -e BACKEND_PORT=8443 -p 80:80 rmm-frontend

frontend/index.html

@@ -4,7 +4,9 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/vite.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>frontend</title>
+    <title>RMM</title>
+    <!-- Runtime-Konfiguration (wird durch Docker-Entrypoint gesetzt) -->
+    <script src="/config.js"></script>
   </head>
   <body>
     <div id="root"></div>