JavaScript / node.js job - modify an existing, small project

A small job in an existing node.js project, with a frontend written in js. It is a very small, single view web app for project management.
 • Add a gantt view using something like [login to view URL] • Update milestones and add sub milestones to have title, assignable users, finished by (ETA date), date from, date to (actual date it finished), description, status (on-time, late, completed, cancelled). ‘On-time’ and ‘late’ should be set automatically via date from and date to. • Add the option to have multiple milestones and sub milestones in a project • Update the readme with any changes