Added .env configuration to remove hardcoded IP issues

frontend/src/App.js

@@ -1,7 +1,8 @@
 import React, { useState, useEffect } from 'react';
 import { Search, FileText, AlertCircle, Download, Upload, Eye, Filter, CheckCircle, XCircle, Loader, Trash2, Plus } from 'lucide-react';
 
-const API_BASE = 'http://192.168.2.117:3001/api';
+const API_BASE = process.env.REACT_APP_API_BASE || 'http://localhost:3001/api';
+const API_HOST = process.env.REACT_APP_API_HOST || 'http://localhost:3001';
 
 const severityLevels = ['All Severities', 'Critical', 'High', 'Medium', 'Low'];
 
@@ -625,8 +626,8 @@ export default function App() {
                                         </div>
                                       </div>
                                       <div className="flex gap-2">
-                                        <a 
-                                          href={`http://192.168.2.117:3001/${doc.file_path}`}
+                                        <a
+                                          href={`${API_HOST}/${doc.file_path}`}
                                           target="_blank"
                                           rel="noopener noreferrer"
                                           className="px-3 py-1 text-sm text-[#0476D9] hover:bg-blue-50 rounded transition-colors border border-[#0476D9]"