N/A.

Railway deploys your apps in docker containers, if you build with nixpacks then Railway will use the appropriate base-image for your application like node for nodejs applications

These base images often run on somesort of lightweight linux distro like alpine or debian

if you'd like to have control over the OS your application runs on then you can create a Dockerfile in your app's root and specify everything there

thanks for the information!

No problem

!s