[docker] health check fixes

[infotroph]

Description

Motivation and Context

Review Time Estimate

• Immediately
• Within one week
• When possible

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• My name is in the list of CITATION.cff
• I have updated the CHANGELOG.md.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[robkooper]

nice catch

[dlebauer]

are there any guidelines for when we should use the --no-install-recommends flag for apt-get? It seems to be used inconsistently (~50:50) in our Docker images.

[robkooper]

I try to use it as much as possible. The recommended packages are often good for normal use, but we want to try and keep the image as small as possible, hence the --no-recommends