Unable to build CC: Tweaked Documentation site on gradle

[SkyTheCodeMaster]

So, I'm trying to add a pastebin module to CC:T. I have the module, and when I add it to my local copy of the CC:T github repo, I can lint it fine, with no errors/warnings from it.
I'm trying to build the documentation site to see how the documentation looks, but when I do ./gradlew docWebsite, it fails within 5 seconds withn the error sh: 1: node_modules/.bin/rollup: not found. I don't know what I'm doing wrong, as the illuaminate lint runs fine.

[SkyTheCodeMaster]

Forgot to include the link to the pastebin module! sorry!
https://gist.github.com/SkyTheCodeMaster/12aeb6cd7d2890640bd81bab66261a4b

[SquidDev]

See https://github.com/SquidDev-CC/CC-Tweaked/blob/mc-1.15.x/CONTRIBUTING.md#setting-up-the-tooling.