Summary: The docker image is "grist" not "grist-core"
Test Plan: tested on a fork
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3158
Summary:
* Keeps `grist-core:latest` docker image up to date with grist-core
source, with a daily cron job.
* Update yarn.lock file.
* In passing, tag current version for a versioned release.
When a push to `main` branch passes tests, the result is placed in `latest_candidate` branch. The cron job will update docker up from `latest_candidate`, placing code used for image in `latest` branch.
Test Plan: tested in a grist-core fork
Reviewers: georgegevoian
Reviewed By: georgegevoian
Differential Revision: https://phab.getgrist.com/D3156
