Custom Column using reference to the Metabase URL

Hi,

any idea please, how to use inside a Custom Column the URL of the Metabase server the user is working on?
So same feature that is available on a click-able column field, where we need only to define the path of the URL and the host is automatically added by metabase.

So, in Custom Field, instead for example:

concat(
  "https://my-mb-server.com/api/photo?id=",
  [Entry Photo Hi → ID],
  "&width=60"
)

we could write just:

concat(
  "/api/photo?id=",
  [Entry Photo Hi → ID],
  "&width=60"
)```

This is needed to generated link to image url, that image is then displayed inside a table view.

Thanks
David