chore: Use encrypted DB connection, for real this time

[jzimbel-mbta]

Summary of changes

Asana Ticket: -

Followup to #785 and #786.

Dev deploy is succeeding.

👉 Here are the overall changes across these 3 PRs. 👈

(I'm not sure why all the other repos do a complicated multi-step dance of downloading the certfile to one image and then copying it one or more times through to the final image. You can just download it directly to priv/ right before compiling and releasing. 🤷‍♂️)

Reviewer Checklist

• Meets ticket's acceptance criteria
• Any new or changed functions have typespecs
• Tests were added for any new functionality (don't just rely on Codecov)

[lemald]

(I'm not sure why all the other repos do a complicated multi-step dance of downloading the certfile to one image and then copying it one or more times through to the final image. You can just download it directly to priv/ right before compiling and releasing. 🤷‍♂️)

At least in the case of Skate, I just didn't know Docker very well at the time and therefore didn't do it in a very efficient way. 😅

[jzimbel-mbta]

At least in the case of Skate, I just didn't know Docker very well at the time and therefore didn't do it in a very efficient way. 😅

I didn't know Docker well enough to understand why the extra steps weren't necessary until I was forced to go look things up to fix my mistakes, so no worries!