Allow custom cetificates in helm chart

[deefdragon]

The helm chart has the certs.create environment variable, but this generates certificates locally. It would be greate if the user could provide their own certificate secret, and still have the necessary cert-enable script be added. (IE so that certs generated via certmanager could be used)

[toupeira]

Was looking for this too and saw it was recently added in https://github.com/bokysan/docker-postfix/pull/233

@bokysan could we bother you to push a new release of the Helm chart? 😀

[bokysan]

I usually wait for a couple of issues before releasing a new version. I'll do something before the end of the month if nothing else pops up.

In the meantime, you can test it by using :edge version.

[toupeira]

Thanks, that's fair! 😀