Why not a virtual machine? I've been doing that for nearly a decade now. Back when it was actually sort of painful. Now we have 32+ gigs of RAM and 8 core CPUs.

Why not a virtual machine? I've been doing that for nearly a decade now. Back when it was actually sort of painful. Now we have 32+ gigs of RAM and 8 core CPUs. You get snapshots and if your drive image is small enough you can toss it on a USB SSD drive and take it wherever you need to. Docker was never good enough. Especially if you're on a Mac. It's a Linux VM with more overhead added and greater access to the host making it less secure than just using a VM in the first place.