Create container for Mailing Service (Dovecot + Postfix + Webmail)

[clee231]

One of the main services running on Chopin are the mail server services. This includes Dovecot (IMAP/POP), Postfix (SMTP), and Webmail (Roundcube).

@SohamG mentioned using OpenSMTPD. Let's try it out and see how it compares.

Acceptance Criteria

• A dockerfile is created to containerize the mail services.
• Terraform is written to deploy these containers on either Kubernetes or Proxmox.
• The container image is based off a well-maintained image.

Additional Information

• https://www.opensmtpd.org/

[clee231]

Dockerfiles repo: https://github.com/acm-uic/acm-mail

[SohamG]

I am trying to upstream CI for opensmtpd so we should have official containers soon. I propose moving the mail to a domain we control so that we can use LE certs with cert-manager.