change file structure

Reviewed-on: #21
Reviewed-by: Get in my car i have candy <huydw@proton.me>

src/app/services/employee-api.service.ts

@@ -1,7 +1,7 @@
 import {inject, Injectable} from "@angular/core";
 import {HttpClient} from "@angular/common/http";
 import {Observable} from "rxjs";
-import {Employee} from "../Employee";
+import {Employee} from "../employee/Employee";
 
 
 @Injectable({