puma is not accepting the PROPFIND http method by default. and log the following message:
Unsupported HTTP method used: PROPFIND
To resolve the problem I've copied a Gemfile.local config with the webrick dependency and started the container with the command rails server -u webrick -b 0.0.0.0 then the call with the PROPFIND http method where correctly sent to the redmine app.
It would be nice to have an environment variable to enable all http methods with puma.