you need that nodejs
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Install that and after chek in cmd console : npm -v node -v
if you showing 12.22.12 you are good.
Now go to onyx2 server and press shift + RMB to open powershell console, and on that you can execute npm run build (For all)
But, first. go to google and dowland xampp , install and go to your data base and make 2 bases (one and one_logs) , before that you go in onyx directory and upload logs and server .sql to your mysql databases, after you go to mysql.json and change your credientials
before that run npm run build and wait, last step is run to server from batch and that is.
Go to ragemp and join with local ip
But there is one big problem
NO DLC, maybe bug-free and cef may not work
that is reason for why i ask Tiero about dlc packs
sorry for my bad english, i try to help you