I installed it successfully on a droplet on DigitalOcean (linux server) - was fairly simple even though I have never installed anything before on a linux server. Happy to answer any questions you have on this. I simply used the same instructions I used to install it on my desktop (Windows 10) but googled how to install each of the elements (git, node etc) on Linux.

https://github.com/adaptlearning/adapt_authoring/wiki/Installing-Adapt-Origin