Fix bind-mount volume path "client/client"
Fix bind-mount volume path "client/client"

	yarn will otherwise complain about missing client/package.json
	in "make client-test"

Signed-off-by: Daniel Holbach <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@weave.works>

weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope,weaveworks/scope