[image-builder-mk3]: set x-forwarded-for header value to 127.0.0.1

[mrsimonemms]

Description

Setting the X-Forwarded-For value to 127.0.0.1 ensures that an IPv4 address is returned from the container registry authentication protocol. With docker.com for example, if IPv6 is enabled, it returns the URL auth.ipv6.docker.com which appears not to be a valid subdomain.

How to test

Release Notes

Set the x-forwarded-for value to `127.0.0.1` to prevent container registry auth errors

Documentation

[mrsimonemms]

/assign @csweichel

[csweichel]

/lgtm
/approve no-issue

[roboquat]

LGTM label has been added.

Git tree hash: f97f7cd234112bbea8e3eb713df88a66f04c96b7

[roboquat]

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