GUS-W-16050052
GUS-W-16052317

Uses memory.high if available (recommended way of setting a functioning soft limit), then first falls back to memory.max (e.g. from 'docker run -m'), then to memory.low (e.g. from 'docker run --memory-reservation'), and finally to memory.min.

Falls back to direct reading of '/sys/fs/cgroup/memory/memory.limit_in_bytes' for cases where that exists, but no full cgroupfs is mounted (e.g. on Heroku).

Limit enforcement (now to 8 TB) is still in place this way - a Docker v1 value will be read, and run into the limit for unrestricted containers, without hitting the fallback and getting returned.

GUS-W-16052317

From https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idcontainer:

> Note: The default shell for run steps inside a container is sh instead of bash. This can be overridden with jobs.<job_id>.defaults.run or jobs.<job_id>.steps[*].shell.