How to download and setup flag-icons-rails
Open terminal and run command
                                            git clone https://github.com/spadarjauhien/flag-icons-rails.git
                                        
                                        git clone is used to create a copy or clone of flag-icons-rails repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with flag-icons-rails https://github.com/spadarjauhien/flag-icons-rails/archive/master.zip
Or simply clone flag-icons-rails with SSH
                                            [email protected]:spadarjauhien/flag-icons-rails.git                                    
                                    If you have some problems with flag-icons-rails
You may open issue on flag-icons-rails support forum (system) here: https://github.com/spadarjauhien/flag-icons-rails/issuesSimilar to flag-icons-rails repositories
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