Setup Mailgun for Newsletters

[haIIux]

Describe the requested feature
With the hope that we will introduce blogs created by users, I think that it would be beneficial to introduce some sort of newsletter which can be opted-into during account registration. This newsletter will curate the latest weekly / bi-weekly articles / content posted by the community and send an email accordingly.

Thankfully, the Vapor community has created this package in which I am told works without issue and currently runs on the same Vapor version (Vapor 4) that we use. While there should be some caution taken, as the last commit was 2 years ago and there is currently 3 open PR's. I have been told by some community members, that it works without issue.

The reasoning on the use of Mailgun is, it is free up to 1000 emails per month to start thus, keeping organizational overhead costs at a minimum until necessary.

Acceptance Criteria

• Integrate Vapor Mailgun
• Curate a list of content within a period of time.
• Create a template for that content with proper branding.

[haIIux]

Upon further review, the above tasks may not be completely possible using the free tier as Mailgun requires custom domain setup which would require the $35.00 a month plan.