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