How to download and setup rack-weixin
Open terminal and run command
                                            git clone https://github.com/wolfg1969/rack-weixin.git
                                        
                                        git clone is used to create a copy or clone of rack-weixin 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 rack-weixin https://github.com/wolfg1969/rack-weixin/archive/master.zip
Or simply clone rack-weixin with SSH
                                            [email protected]:wolfg1969/rack-weixin.git                                    
                                    If you have some problems with rack-weixin
You may open issue on rack-weixin support forum (system) here: https://github.com/wolfg1969/rack-weixin/issuesSimilar to rack-weixin repositories
Here you may see rack-weixin alternatives and analogs
rails discourse gitlabhq devise diaspora spree activeadmin kaminari simple_form factory_bot classroom textbook-curriculum github-ds diplomat awesome-opensource-apps acts_as_api browserify-rails mumuki-laboratory react-rails brakeman octicons mailcatcher cancancan administrate refinerycms simplecov webpacker suspenders buffalo graphql-ruby