how to update posted time locally in node.js

I wanna update time for post when user created post. i tried some method but didnt get expected results.

Note - im storing created post in array. (locally)

const posts = [];

const addedDate = new Date();
const addedTime = addedDate.getMinutes();

exports.getIndex = (req, res, next) => {
  res.render('index', {
    pageTitle: 'NewsFeed',
    path: '/',
    post: posts,
    time: addedTime,
  });
};

exports.getPost = (req, res, next) => {
  res.render('post', {
    pageTitle: 'Create Post',
    path: '/post',
  });
};

exports.postAddPost = (req, res, next) => {
  posts.unshift({ title: req.body.title });

  res.redirect('/');
};

Here is the pic of post time is not updating i want to time auto update like 1min ago - 1hr ago - 1 day ago

https://i.stack.imgur.com/eTD02.png