feat: use different resource for listing songs in albums

ui/src/dataProvider.js

@@ -1,7 +1,10 @@
 import { fetchUtils } from 'react-admin'
 import jsonServerProvider from 'ra-data-json-server'
 
+const baseUrl = '/app/api'
+
 const httpClient = (url, options = {}) => {
+  url = url.replace(baseUrl + '/albumSong', baseUrl + '/song')
   if (!options.headers) {
     options.headers = new Headers({ Accept: 'application/json' })
   }
@@ -19,6 +22,6 @@ const httpClient = (url, options = {}) => {
   })
 }
 
-const dataProvider = jsonServerProvider('/app/api', httpClient)
+const dataProvider = jsonServerProvider(baseUrl, httpClient)
 
 export default dataProvider