How to download and setup lumen
Open terminal and run command
                                            git clone https://github.com/jnsahaj/lumen.git
                                        
                                        git clone is used to create a copy or clone of lumen 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 lumen https://github.com/jnsahaj/lumen/archive/master.zip
Or simply clone lumen with SSH
                                            [email protected]:jnsahaj/lumen.git                                    
                                    If you have some problems with lumen
You may open issue on lumen support forum (system) here: https://github.com/jnsahaj/lumen/issuesSimilar to lumen repositories
Here you may see lumen alternatives and analogs
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