Although a builder from the store cannot be created unless
it has a valid name, this is not the case for a Docker context.
We should skip name validation when checking a node from the
store and fall back to finding one from Docker context instead.
Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
* Return errors from creating the `NodeGroup`
* Ensure that `b.NodeGroup != nil` before reading from
it during validation
Signed-off-by: Milas Bowman <milas.bowman@docker.com>