Added localhost to webpack devserver allowed hosts

frontend/vue.config.js

@@ -4,6 +4,9 @@ const projectRoot = path.resolve(__dirname)
 
 module.exports = {
   assetsDir: 'static',
+  devServer: {
+    allowedHosts: ['localhost']
+  },
   configureWebpack: {
     resolve: {
       alias: {