I missed two things:
1) `rake` wasn't available in the path (surprising but ok!), so I replaced it with the more modern and more portable `bin/rails` invocation.
2) Without specifying a `host`, Rails was trying to connect with the database over a socket instead of over a port. Here, we tell it where to actually connect!
I think I'll need to make some tweaks here, since this isn't compatible with my _own_ local setup—maybe I'll revert `database.yml`, and have the dev container use the `DATABASE_URL` environment variable to override it?
But whatever, this is working for now, and that's exciting to me!
Note: On my machine, the install step hangs for a loooong time, to the point where I usually give up. On Codespaces, it also took a while at the same step (`Installing devise-encrpytable`), but eventually got through it. Maybe on my machine it would work if I'm more patient? Idk! But it's good to see it working on something!!
Idk why, but unlike my previous experience with Rails devcontainers, this time the setup process is running so wildly slowly?
Might just be a transient issue on my machine, maybe something that would be improved with a restart and trying again another time? Or could be something about the MySQL image that doesn't run great in this context?
In any case, I'm just gonna set this down for now!
