I’d like to ask for GitHub - calendso/calendso: Scheduling infrastructure for absolutely everyone. support which is a self-hosted Calendly alternative.
The maintainers stated they are not interested in adding/maintaining docker support for this project. There have been some community efforts but all of them got outdated and unmaintained quite quickly, hence I’d thought of linuxserver[dot]io (only allowed to use two links) as a potential solution.
Here is one of these efforts - note that even though this is hosted within their organization, it is not supported/maintained by the Calendso team.