[doc/book/admin/setup] add section about docker install
Document: cubicweb-docTitle: CubicWeb DocumentationAuthor: LogilabAbstract: Some base documentation for CubicWeb users and developersSection: ProgrammingFormat: HTMLIndex: /usr/share/doc/python3-cubicweb-documentation/html/index.htmlFiles: /usr/share/doc/python3-cubicweb-documentation/html/*