As this is ongoing project, there will be more changes on requirement as this project goes. Currently this application is developed using: Ruby (3.1 or later) PostgreSQL (14 or later) Bundler gem node.js (16.0 or later) ImageMagick And various other requirement for the gems (check Gemfile for the list) On RHEL, it goes like this (untested): ImageMagick gcc gcc-c++ git jhead libxslt-devel libyaml-d