feat: 로그인 요청 시 referer 헤더 추가

src/app/api/auth/route.ts

@@ -9,18 +9,14 @@ import { tracking } from '@/libs/tracking'
 export async function POST(request: Request) {
   const { loginId, pwd } = await request.json()
 
-  const result = await axiosInstance(`${process.env.NEXT_PUBLIC_QSP_API_URL}`).post(
-    `/api/user/login`,
-    {
-      loginId,
-      pwd,
-    },
-    {
-      headers: {
-        referer: process.env.NEXT_PUBLIC_QSP_API_REFERER,
-      },
-    },
-  )
+  const headers: Record<string, string> = {
+    referer: process.env.NEXT_PUBLIC_QSP_API_REFERER || '',
+  }
+
+  const result = await axiosInstance(`${process.env.NEXT_PUBLIC_QSP_API_URL}`, headers).post(`/api/user/login`, {
+    loginId,
+    pwd,
+  })
   console.log('🚀 ~ result ~ result:', result.data)
 
   let finalResult = {}