how to redirect using Rest API to HTML page in nodejs

i have created login api, i want to redirect to homepage after login successfully.

                  code:
                router.post('/login', function(req,res ,next){
                var session = req.session;
                var username= req.body.username;
                var password= req.body.password;
               User.findOne({username:username,password:password},function(err, user){
            if(err){
            console.log(err);
             return res.status(500).json("Error");
             }
        if(!user)
        { 
            return res.status(404).json("User Not Found");
    }
    session.isLogin = true;
       return res.status(200).json("Login Successfully!!!");
     res.redirect('/public/modules/login/homepage.html');
        });
             });

via Poonam