perf[chore]: add mock.js to instead of easy-mock (#281)

src/main.js

@@ -15,6 +15,16 @@ import router from './router'
 import '@/icons' // icon
 import '@/permission' // permission control
 
+/**
+ * This project originally used easy-mock to simulate data,
+ * but its official service is very unstable,
+ * and you can build your own service if you need it.
+ * So here I use Mock.js for local emulation,
+ * it will intercept your request, so you won't see the request in the network.
+ * If you remove `../mock` it will automatically request easy-mock data.
+ */
+import '../mock' // simulation data
+
 Vue.use(ElementUI, { locale })
 
 Vue.config.productionTip = false