I went ahead and tried it anyways, changing all instances of 259 in the docker setup to 320 per the releases shown here: Docker Hub.
This did not work and failed with an error that is hard to make use of:
deployment-1650116695: digest: sha256:7edc1f33335d48f551cf70586d2f43a2f623817960b1f627ffb5cda3ae22286a size: 3037
--> Pushing image done
image: registry.fly.io/rpt-rinkeby-ipfs:deployment-1650116695
image size: 83 MB
==> Creating release
Error An unknown error occured.
+ kill 0