Pug is engine template for express & is used to render the dynamic files

Pug is come with built in function in node js and if we got any problem in rendering then you have to download pug (npm i pug)

Tell express which template engine we are gonna use

//Setting Pug(template engine)
app.set('view engine','pug');
// app.set('views',path.join(__dirname,'views'));
app.set('views',`${__dirname}/views`); // (1)

// router for pug (template engine )
app.use('/',viewRouter);

 res.status(200).render('overview'});
// It will look for 'overview' file into the views (1) folder as we 
// specified it .Take that template & render it & then send to the 
// browser

Simply, Pug is a simple whitespace sensitive syntax for writing html

Now we will discuss - First step with Pug (Link)