feat: integrate Turnstile captcha verification in signup process

apps/landing/src/lib/fetcher.ts

@@ -2,5 +2,5 @@ import type { paths } from '@/openapi-types';
 import createClient from 'openapi-fetch';
 
 export const fetcher = createClient<paths>({
-  baseUrl: process.env.NEXT_PUBLIC_API_URL ?? 'https://api.imphnen.dev',
+  baseUrl: process.env.NEXT_PUBLIC_API_URL,
 });

apps/landing/src/lib/rpc.ts

@@ -3,6 +3,6 @@ import createFetchClient from 'openapi-fetch';
 import createClient from 'openapi-react-query';
 
 const fetchClient = createFetchClient<paths>({
-  baseUrl: process.env.NEXT_PUBLIC_API_URL ?? 'https://api.imphnen.dev',
+  baseUrl: process.env.NEXT_PUBLIC_API_URL,
 });
 export const rpc = createClient(fetchClient);