Mirror the complete pub folder in containerized proxy

[cbosdo]

What does this PR change?

Since the user cannot call mgr-bootstrap on the containerized proxies,
mirror the complete /pub folder to get the server SSL cert and the
/pub/bootstrap folder content. (bsc#1199802)

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• No tests: proxy containers are not yet tested automatically

• DONE

Links

Fixes https://github.com/SUSE/spacewalk/issues/17942

• DONE

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[aaannz]

Don't we need to adjust squid config as well?
Is default refresh_pattern . 0 100% 525600 ok for it? I am not an expert on squid config, but this seems like a setup for stable files.

[cbosdo]

Don't we need to adjust squid config as well? Is default refresh_pattern . 0 100% 525600 ok for it? I am not an expert on squid config, but this seems like a setup for stable files.

oh right, we may want to tweak this... but I am not a squid user as well

[cbosdo]

Don't we need to adjust squid config as well? Is default refresh_pattern . 0 100% 525600 ok for it? I am not an expert on squid config, but this seems like a setup for stable files.

oh right, we may want to tweak this... but I am not a squid user as well

Seems to me that those files are fairly stable and not updated that often... I would consider it good enough for now and adjust later if there is any issue

[juliogonzalez]

Label removed. Please add it only when all conditions are met (reviewers are still pending)