feat: add /api/sample route

src/router.js

@@ -1,10 +1,12 @@
 import express from "express"
 import user from "./controllers/user.js"
+import sample from "./controllers/sample.js"
 
 const router = express.Router({
     caseSensitive: true
 })
 
 router.use("/user", user)
+router.use("/sample", sample)
 
 export default router