Makes --proxy added in #46 available to Docker containers

[mwalling-dc]

Background

#46 added the --proxy CLI arg. This change adds the ability to pass the value for that token as an environment variable into the container.

Results

• Shortcut: [SC-90394]
• Resolves Proxy configuration support in Docker images #996

After

Specifying ProxyName as an environment variable to the container will add it as the value of the --proxy CLI flag.

Testing

This has been running in production for approximately a year. We're trying to unwind our customizations on top of the upstream image.

[CLAassistant]

All committers have signed the CLA.

[rhysparry]

Thanks for this PR. With some minor changes we should be able to approve.

Could you please add details of any testing you might have done to your PR description?

Many thanks

[rhysparry]

Looks good. Thanks for the contribution.

[rhysparry]

Thanks again. This change is available from version 8.1.2115 onwards