Replacement for "always start with this configuration"

[diocas]

Without access to EOS in the JupyterHub container, we need to decide if we want to provide an alternative implementation for the functionality, or just remove it completely.

Using named servers might be a possibility, if the configuration already gets saved by JH (to be checked). Also to be checked if this applies to the default server or only to the named ones.

I even see this as a suggestion upstream, so that we can set configurations for all servers, giving users a button to "change config" and "start session" (which would always pick the configuration already set).