This OCSP responder operates from pre-produced set of OCSP responses. The responder is light-weight, does not require signing key handling. It simply serves files from a disk.
The server itself is installed as OCSPServer.php in the cgi-bin directory (/usr/lib/cgi-bin by default).
Its configuration is expected to be in the /usr/local/etc/OCSPServer.ini file. You can change the configuration file location in the actual OCSPServer.php file.