Thank you very much for this project, not only because it looks nice but also to have created with a long lost spirit: "I do something nice for myself and I share it with the world" open source, and doing something straight simple with dependency!
I wish more things are released like that.
Also your tool might be very useful because there isn't a good Gantt tool that is lightweight anymore, i search for one recently and my only solution in the end was to use an excel template...
My 2 feedbacks if you are interested: - it is annoying to have the "category" required to create a task. Maybe you could create a task with an "undefined" category if none provided? - a great feature would be to be able to export the result output or view in a PNG picture or SVG.
Feature request: A really useful addition would be the ability to reference an existing (remote) chart via say a URL parameter for display.
Gonna give this a shot! Looks promising for SharePoint sites that are internal.