Unable to run docker image

[inverse]

I followed the instructions on the readme trying to run the locally built docker image and get the following error:

docker: Error response from daemon: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: exec: "bundle": cannot run executable found relative to current directory: unknown.

which is strange as when I overwrite CMD with which bundle I get:

.bundle/bin/bundle