Spoffy a8431c69a7 Makes docker images default to non-root execution (#1031) ...

De-escalates to a normal user when the docker image is run as root.

Allows GRIST_DOCKER_USER and GRIST_DOCKER_GROUP to be passed to override the default de-escalation behaviour.

Backwards compatible with previous root installations.

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This change adds a new docker_entrypoint.sh, which when run as root de-escalates to the provided user, defaulting to grist:grist. This is similar to the approach used by the official postgres docker image.

To achieve backwards compatibility, it changes ownership of any files in `/persist` to the user it's given at runtime. Since the docker container is typically run as root, this should always work.

If the container is run as a standard user from the very start:
* It's the admin's responsibility to ensure `/persist` is writable by that user.
* `/grist` remains owned by root and is read-only.

2024-06-27 14:24:32 +01:00

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