Expose public path of SIPs in Archive object
After #49 (closed) is done, expose in Archive field (e.g. public sip path, obtainable by basicSIPpublicPath + sip-path) the public path where NGINX is serving the files
After #49 (closed) is done, expose in Archive field (e.g. public sip path, obtainable by basicSIPpublicPath + sip-path) the public path where NGINX is serving the files