Routes with variable number of path segments

[aceeric]

Folks - How would one go about matching routes with variable segments in which the left-most, and, the right-most have a fixed interpretation but the "inside" segments are everything else. E.g.:

docker pull docker.io/hello-world:latest.: left-most is registry, rightmost is tag, everything else is repository. Then that rule holds for all these:

docker pull docker.io/foo/bar:latest.
docker pull docker.io/foo/bar/baz:latest.
docker pull docker.io/foo/bar/baz/and/so/on:latest.

I currently handle this with explicit routes but I'm wondering if there's a more flexible way - such as one route with "wildcards". I'm generating the Echo code using oapi-codegen. OAPI 3 does not support this but if Echo did, that might lead me to move away from oapi at least in the short time. (I understand OAPI 4 is going to support this.)