Share virtualbox across bootcamp

[kennyhyun]

The idea is

• create VirtualBox VM on Windows NTFS partition
• NTFS access using NTFS-3g
• setup script to mount NTFS volume
• configure vagrant using the common resource in NTFS

not sure if it's possible though

[kennyhyun]

This would be a rare case, but someone who is using Bootcamp, Docker Desktop will install two VMs and the user may suffer from the disk space.