Alpine ssl

[DavidTanner]

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What does this PR aim to accomplish?:

I recently set up pihole on Alpine linux bare metal with an SSL certificate signed by LetsEncrypt. The process took a bit of effort to put everything together, and I want to share what I learned with others.

How does this PR accomplish the above?:

Using the instructions here, users should be able to set up Dehydrated for Alpine, and CloudFlare for DNS, to get SSL certificates for their PiHole running on Alpine baremetal

Link documentation PRs if any are needed to support this PR:

N/A

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