Pin Poetry versions to speed up build time

[Nava-JoshLong]

In our repo, the build times for the release image was taking ~10 minutes, with the poetry installs taking over 4 minutes. Upon researching, I found this thread where it says that when a poetry version is specified as a range of versions (ie alembic = "^1.8.1"), then poetry has to resolve any dependencies or issues for a range of versions. If you change it to a specified version (alembic = "1.9.1"), it can help speed up build times. Once we changed to pinned versions, it dropped the build time to ~6 minutes, with the poetry installs taking ~1 minute now.

I have the versions pinned in local changes, but since this is a basic app, it only saves ~10 seconds. I'll be adding some docs explaining the tweaks and reasoning behind it so that other repos can make the changes and report back the time saved