Deploy rails app

I want to deploy rails app in OS centos 7, with Nginx, Unicorn and Capistrano so which guide or tutorials is best for deploying rails app ???

? "best" depends on your background, learning style, etc. -- have you
read the Capistrano docs? Do you have specific questions?

For the server side Digitalocean got some good ones like https://www.digitalocean.com/community/tutorials/how-to-deploy-rails-apps-using-unicorn-and-nginx-on-centos-6-5

For capistrano, the docs are great, google, stackoverflow… but yeah post any specific questions.

Big thrums up for Digitalocean, great set of howtos.

Why not use docker?