refactor: Dynamically resolve API base URL from window.location and…

.env.example

@@ -1,4 +1,3 @@
-VITE_API_BASE_URL=http://localhost/NesterApp/backend/api
 DB_HOST=localhost
 DB_NAME=nester_db
 DB_USER=root

INSTALLATION.md

@@ -31,10 +31,7 @@
      ```bash
      npm install
      ```
-   - Stelle sicher, dass deine `.env` die korrekte API-URL enthält:
-     ```env
-     VITE_API_BASE_URL=http://localhost/NesterApp/backend/api
-     ```
+   - Die API-URL wird automatisch anhand des Servernamens ermittelt – keine manuelle Konfiguration nötig.
    - Starte den Entwicklungsserver:
      ```bash
      npm run dev

src/services/nestService.js

@@ -1,5 +1,9 @@
-// We will default to a common path structure, e.g. http://localhost/Taubennester/backend/api
-export const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || 'http://localhost/Taubennester/backend/api';
+// Dynamically resolve the API base URL from the current server's origin.
+// This ensures the app works on any server without build-time configuration.
+export const API_BASE_URL = (() => {
+    const { protocol, host } = window.location;
+    return `${protocol}//${host}/backend/api`;
+})();
 
 // Helper to build headers with token
 const getHeaders = (token) => {