some combination of
adding openssl and ca-certificates to the dockerfile (thanks @flicknow.bsky.social!)
adding binaryTargets = ["native", "debian-openssl-1.1.x"] to the prisma generator
It looks like the Prisma quickstart for Planetscale has you connecting to a local proxy at localhost:3309 and then Plantscale's pscale CLI proxies that to your actual DB?