This would explain the steps and different solutions for deploying Rails applications.
What do you think?
This has been dicussed in the past.
We prefer not to cover such practices in the Rails documentation, because the majority of what you have to say depends on external software, web servers, application servers, their configuration, databases, operating systems, hosting providers, etc.
I agree with you on this point.
However Rails already have a dedicated chapter:
https://edgeguides.rubyonrails.org/configuring.html#deploy-to-a-subdirectory-relative-url-root
I think it would be interesting to put it more forward