Adding copy command to userspace dockerfile

when the pod spins up across the cluster it copies the userspace binary
to the host and then terminates. kubernetes then interacts with this
binary from the host

Signed-off-by: John O'Loughlin <[email protected]>

Author: johnoloughlin

Diff for: docker/userspacecni/Dockerfile

@@ -16,3 +16,4 @@ RUN make build
 FROM ubuntu:22.04
 RUN mkdir -p /root/userspace-cni-network-plugin/userspace
 COPY --from=builder /root/userspace-cni-network-plugin/userspace/userspace /root/userspace-cni-network-plugin/userspace/userspace
+CMD ["cp", "-rf", "/root/userspace-cni-network-plugin/userspace/userspace", "/opt/cni/bin"]