Dokku vs HatchBox: What are the differences?
Dokku: Docker powered mini-Heroku in around 100 lines of Bash. Docker powered mini-Heroku. The smallest PaaS implementation you've ever seen; HatchBox: Super easy Rails servers. Configure any server to run Ruby on Rails servers in minutes and without hassle.
Dokku and HatchBox can be primarily classified as "Platform as a Service" tools.
Dokku is an open source tool with 17.7K GitHub stars and 1.44K GitHub forks. Here's a link to Dokku's open source repository on GitHub.