Postmark setup- email for notifying admin on user sign

[ahweigl]

Description/Problem

Postmark setup + notifying admin when user signs form
**NOTE: employee 1 in seed file will need to be changed w/ iris' info for demo

Please include a summary of the change and which issue is fixed.
Please also include relevant motivation and context.
List any dependencies that are required for this change.

Solution

What did you change?
signFormInstance in form-instance-service

Dependencies

[ ] This PR adds new dependencies

Testing

Please describe how you tested this PR (manually and/or automatically)
Provide instructions so we can reproduce, and include screenshots of UI changes.

• Manual Tests?
  • Sent a ton of emails lol

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
mfa-form-automator	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 23, 2024 11:35pm

[kaiyangzheng]

looks good, just delete some comments and logs

[AnshulShirude]

Looks good! Just left the one question.

[gitguardian]

⚠️ GitGuardian has uncovered 2 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
9631676	Triggered	Postmark Token	d4b491b	.github/workflows/main.yml	View secret
9631676	Triggered	Postmark Token	ef0bc79	.github/workflows/main.yml	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secrets safely. Learn here the best practices.
3. Revoke and rotate these secrets.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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<sup>🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.

Our GitHub checks need improvements? Share your feedbacks!</sup>