cops
                                Calibre OPDS (and HTML) PHP Server : web-based light alternative to Calibre content server / Calibre2OPDS to serve ebooks (epub, mobi, pdf, ...)
                            
                        How to download and setup cops
Open terminal and run command
                                            git clone https://github.com/seblucas/cops.git
                                        
                                        git clone is used to create a copy or clone of cops 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 cops https://github.com/seblucas/cops/archive/master.zip
Or simply clone cops with SSH
                                            [email protected]:seblucas/cops.git                                    
                                    If you have some problems with cops
You may open issue on cops support forum (system) here: https://github.com/seblucas/cops/issuesSimilar to cops repositories
Here you may see cops alternatives and analogs
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