Test rig

Using mongo:latest image, tested on "MONGO_VERSION=4.0.1".

Docker for Windows

Key	Value
Version	18.06.0-ce
API version	1.38 (minimum version 1.12)
Go version	go1.10.3
Git commit	0ffa825
Built	Wed Jul 18 19:13:46 2018
OS/Arch	windows/amd64
Experimental	false