fix docker, add base routing, header + drawer

frontend/vite.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  watch: {
+    usePolling: true,
+    interval: 300, // alle 300ms nach Änderungen suchen
+  },
+});