v2.3.0: Model updates and Debian change

Summary

Model updates (see here), addition of the service-info endpoint, and an updated ER diagram workflow. This also includes the change from Alpine to Debian.

What's Changed

• Update utils.py by @SonQBChau in #145
• Update models.py by @SonQBChau in #148
• construct url for schema.yml by @daisieh in #146
• Sonchau/test date to string by @SonQBChau in #149
• Sonchau/service info by @SonQBChau in #150
• DIG-1320: Update Dockerfile by @SonQBChau in #153
• DIG:1217 Create ER diagram workflow and add to READMEs by @mshadbolt in #154

New Contributors

• @mshadbolt made their first contribution in #154

Full Changelog: v2.2.1...v2.3.0