revert(nc-gui): constant for base url

packages/nc-gui/lib/constants.ts

@@ -4,8 +4,7 @@ export const NOCO = 'noco'
 
 export const SYSTEM_COLUMNS = ['id', 'title', 'created_at', 'updated_at']
 
-export const BASE_URL =
+export const BASE_URL = process.env.NC_BACKEND_URL || (process.env.NODE_ENV === 'production' ? '..' : 'http://localhost:8080')
-  process.env.NC_BACKEND_URL || (process.env.NODE_ENV === 'production' ? 'http://localhost:8080' : 'http://localhost:8080')
 
 export const rolePermissions = {
   // general role permissions