How-To

1. Use only what you need from the Gemfile and copy/paste it to your own Gemfile. Basically it would be gems related to Capistrano, something like these ones

   gem 'capistrano', '~> 3.10', require: false
   gem 'capistrano-rails', '~> 1.4', require: false
   gem 'capistrano-bundler', '>= 1.1.0'
   gem 'rvm1-capistrano3', require: false
   gem 'capistrano3-puma'

2. From this repository, copy/paste those files to the same path of your existing application: Capfile, /config/deploy.rb, /config/deploy/production.rb
3. The Capfile file needs to be at the root of your project
4. Inside the file /config/deploy.rb, update your application name and your repository url
5. Inside the file /config/deploy/production.rb, update the deploy_to path