我試圖在nodejs中執(zhí)行一個后端程序，我正在使用mongodb。我正在創(chuàng)建一個表單，其中只有兩個輸入字段:密碼和名稱。我沒有使用任何hbs或ejs，也沒有默認(rèn)引擎，但是我的vs代碼終端顯示

"No default engine was specified and no extension was provided.
    at new View (C:\Users\LENOVO\Desktop\adin\backend\node_modules\express\lib\view.js:61:11)
    at Function.render (C:\Users\LENOVO\Desktop\adin\backend\node_modules\express\lib\application.js:587:12)
    at ServerResponse.render (C:\Users\LENOVO\Desktop\adin\backend\node_modules\express\lib\response.js:1039:7)
    at C:\Users\LENOVO\Desktop\adin\backend\src\app.js:46:25
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)"


app.js

const static_path =path.join(__dirname,"../public");

app.use(express.json());
app.use(express.urlencoded({ extended: false })); 
app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.static(static_path));

app.get("/",(req,res)=>{
    res.render("index");
});

app.get("/index",(req,res)=>{
    res.render("index");
})


//create a new user in database
app.post("/index",async (req,res)=>{
    try{
        const indexSchema=new Index({
            name: req.body.name,
            password: req.body.password
        });

        const indexed=await indexSchema.save();
        res.status(201).render("index");
        
    }catch(error){
        res.status(400).send(error);
        console.log(error);
    }
})


app.listen(port, ()=>{
    console.log(`server is running at port no ${port}`);
})