How to implement koa js. Koa.js is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications. It is an open source framework developed and maintained by the creators of Express.js, the most popular node web framework.

 require("dotenv").config();
    const Koa = require("koa");
    const KoaRoter = require("koa-router");
    const cors = require("@koa/cors");
    const bodyParser = require("koa-bodyparser");
    const json = require("koa-bodyparser");
    const { dbConnect } = require("./utils/dbConnect");
    const courseRoutes = require("./routes/course.routes");
    const studentRoutes = require("./routes/students.routes");
    
    const app = new Koa();
    const router = new KoaRoter();
    
    app.use(cors());
    app.use(bodyParser());
    app.use(json());
    app.use(router.routes()).use(router.allowedMethods());
    app.use(courseRoutes.routes());
    app.use(studentRoutes.routes());
    
    router.get("/", (ctx) => {
      ctx.body = { message: "Student Management API" };
    });
    
    app.listen(9000, () => {
      dbConnect();
      console.log(`Server is running on http://localhost:9000`);
    });

is it correct?