This PR replaces the MailHog Docker container with Mailpit.
Reasons for this change:
- MailHog is no longer maintained.
- Mailpit is an actively developed, open-source alternative.
- Fully compatible as a drop-in replacement.
- Lightweight and Fast: Built with Go, the official Docker image is only
12.5MB.
This change improves performance and ensures we are using a maintained
tool for local email testing.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Chores**
* Replaced the email testing service with a new one that offers a
similar web interface and SMTP port.
* Updated configuration to enhance message storage and persistence for
email testing in development environments.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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