Install ruby-rack-cors by entering the following commands in the terminal:
sudo apt update sudo apt install ruby-rack-cors
Description:
enable Cross-Origin Resource Sharing in Rack apps
Middleware that will make Rack-based apps CORS compatible. . The CORS spec allows web applications to make cross domain AJAX calls without using workarounds such as JSONP.
Homepage: http://github.com/cyu/rack-cors
Version: 1.0.1-2
Section: universe/ruby