This website is dual-licensed:

I want to use this website, what should I do?

Sigh, licenses.

(IANAL) Here is the website’s source code. Please read tldrLegal’s summary of the CC BY-NC-SA 4.0 and the GPLv3 and understand what you can, cannot, and must do when working with these licenses.

And since I obviously can’t force you to do any of this, if you won’t be following the licenses consider at least adding a simple attribution with a link back to this website, e.g.

Based on content from