Update default API URL

Update the default Supabase API URL to http://a11.ism.kr.

src/contexts/auth/signUpUtils.ts

@@ -17,15 +17,20 @@ export const signUpWithDirectApi = async (email: string, password: string, usern
       ? supabaseUrl 
       : `${supabaseUrl}/auth/v1`;
     
+    // URL에 중복 '/auth/v1' 경로가 있는지 확인하고 수정
+    const normalizedUrl = baseUrl.includes('/auth/v1/auth/v1') 
+      ? baseUrl.replace('/auth/v1/auth/v1', '/auth/v1') 
+      : baseUrl;
+    
     // 회원가입 API 엔드포인트 및 헤더 설정
-    const signUpUrl = `${baseUrl}/signup`;
+    const signUpUrl = `${normalizedUrl}/signup`;
     const headers = {
       'Content-Type': 'application/json',
       'apikey': supabaseKey,
       'X-Client-Info': 'supabase-js/2.x'
     };
     
-    console.log('회원가입 API 요청:', signUpUrl);
+    console.log('회원가입 API 요청 URL:', signUpUrl);
     
     // 회원가입 요청 전송
     const response = await fetch(signUpUrl, {