Security Update 2023-11-21
The original version of the instructions above, combined with a version of grist-core up until v1.1.7, produced an insecure configuration which made it possible for an attacker to impersonate any user on the system.
Please be sure to update grist-core and/or the gristlabs/grist docker image to the latest fixed version (v1.1.8, stable, or main).
This alert also applies to grist-omnibus (docker image gristlabs/grist-omnibus). Upgrading to the latest version will fix the issue.
The issue affected specifically the suggested configuration of grist-core with traefik. If you used a different configuration, you may not be affected.