Updating Docker images

[jemrobinson]

✅ Checklist

• I have searched open and closed issues for duplicates.
• This is a request for a new feature in the Data Safe Haven or an upgrade to an existing feature.
• The feature is still missing in the latest version.
• I have read through the documentation.
• This isn't an open-ended question (open a discussion if it is).

🍓 Suggested change

For DSPT certification, it would be nice if we could automatically update our Docker images.

🚂 How could this be done?

• Using latest tag and applying a regular reboot
• An Azure Function (or similar) that explicitly applies updates on a regular schedule
• Something else?

[JimMadge]

I would recommend not using latest as that could be a major version update which breaks things.

[JimMadge]

Azure function to do something like docker pull docker run -d could do this.

[JimMadge]

There is also a risk here of the updates breaking a functioning deployment.
That is more likely with major and minor versions and unlikely with patch versions.
However, it can't be ruled out altogether.