Intersection API Email Generation and Templating

[jacob6838]

PR Details

Description

Adding email generation and templating to the intersection API:

• Creating html email template
• Using thymeleaf templating engine to inject contents into email template
• Adding email sending brokers for SMTP, Postmark, and SendGrid
• Storing email subscription data in postgres
• Generating authenticated unsubscribe links within emails
• Creating email generator for intersection notification summaries

How Has This Been Tested?

This has been tested using the now included smtp server (in the intersection docker-compose), which can be started by adding the profile "smtp4dev"
Then, use the /emails/send-intersection-notification-summary endpoint with some sample notifications to send an email to the default subscribed user, test@gmail.com

Types of changes

• Defect fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that cause existing functionality to change)

Checklist:

• My changes require new environment variables:
  • I have updated the docker-compose, K8s YAML, and all dependent deployment configuration files.
• My changes require updates to the documentation:
  • I have updated the documentation accordingly.
• My changes require updates and/or additions to the unit tests:
  • I have modified/added tests to cover my changes.
• All existing tests pass.

[John-Wiens]

A few minor cleanup things. Otherwise looks good.

[mcook42]

overall I'm really liking the refactors. I have a few blockers so far. I'll keep reviewing the rest tomorrow