I think the error is in the arguments:
["server", "--reverse-proxy", "--service-account my-serviceaccount"] should be ["server", "--reverse-proxy", "--service-account", "my-serviceaccount"]

I just tried but i am still getting the following exception:

com.github.dockerjava.api.exception.InternalServerErrorException: Status 500: {"message":"pods is forbidden: User "system:serviceaccount:namespace:default" cannot create resource "pods" in API group "" in the namespace "namespace""}

It doesn't seem to be setting the service account.

The service account argument makes sure the pods that are created by kubedock hade the specified service account configured. Your error is about kubedock itself not having the permissions of creating pods. The token kubedock is using, should have the proper rbac as well.

true, but i see in the logs it is grabbing the default service account and not the one i specified. I have created a service account with the rbac permissions and tied the permissions to the service account.