chore(frontend): update .dockerignore and .gitignore to correct lib directory entry; add new utility and file handling modules

frontend/lib/env.ts

@@ -0,0 +1,15 @@
+import { env } from 'next-runtime-env';
+
+export const getEnv = (key: string, defaultValue?: string): string => {
+  try {
+    const value = env(key);
+    return value || defaultValue || '';
+  } catch (error) {
+    console.error(`Error getting environment variable ${key}:`, error);
+    return defaultValue || '';
+  }
+};
+
+export const getApiUrl = (): string => {
+  return getEnv('NEXT_PUBLIC_API_URL', 'https://api-evoai.evoapicloud.com');
+};