DoliMed is an extension of the Dolibarr ERP CRM management software.
The Dolibarr software sources are available on GitHub: https://github.com/Dolibarr/dolibarr/
The DoliMed extension sources are available on GitHub: https://github.com/DoliCloud/dolimed/

You can contribute to the development of these two components via the GitHub features available at these links (requires IT development skills).

Bug reports

If not, you'll find links to report bugs here.
Bug reports or update requests for Dolibarr: https://github.com/Dolibarr/dolibarr/issues
Bug reports or update requests for DoliMed: https://github.com/DoliCloud/dolimed/issues