Context

Currently, the custom logo for the Coder login screen must be hosted via an external URL, which can be problematic for clients on restricted networks or with DNS limitations.

Suggestion

Allow the option to store and serve the logo directly from the Coder server, bypassing the need for external resources. This would ensure the logo is accessible even in restricted network environments.

Workaround

As a workaround, the user can use a data URI. If we agree with the workaround, we should document this method and close this issue.

Related to #6339