Running export_server_packages on atsserver

[ki9us]

I'm using the docker image for ats server. When I try to start it, it dies with this message

 [MP] =========================================================================
 *** ERROR *** : [MP] Error: Server packages file not found. This is required to load proper map, DLCs and mods.
 *** ERROR *** : [MP] Error: Use "export_server_packages" command in game to export server game settings.
 *** ERROR *** : [MP] Error: See server_readme.txt.
 *** ERROR *** : [MP] Error: Server was teminated.
 [MP] =========================================================================

The server_readme.txt links to https://modding.scssoft.com/wiki/Documentation/Tools/Dedicated_Server.

Seems like I need to run this export_server_packages in the "console". The doc indicates you do this in steam GUI ("press ~"), but I am putting this on a headless server.

I tried logging into the server console with docker exec -it atsserver sudo -u linuxgsm ./atsserver console but that fails because the server has already crashed.