Install uwsgi-plugin-rack-ruby2.5 by entering the following commands in the terminal:
sudo apt update sudo apt install uwsgi-plugin-rack-ruby2.5
Description:
Rack plugin for uWSGI (ruby2.5)
uWSGI presents a complete stack for networked/clustered web applications, implementing message/object passing, caching, RPC and process management. It is designed to be fully modular. This means that different plugins can be used in order to add compatibility with tons of different technology on top of the same core. . This package provides Rack plugin for uWSGI (linked with ruby2.5 runtime).
Homepage: http://projects.unbit.it/uwsgi/
Version: 2.0.15-10.2ubuntu2
Section: universe/httpd