add toolbox documentation

[maxheld83]

link is in #144

[Crisphi]

https://thewebspark.com/2019/04/02/how-to-enable-virtualization-in-bios-of-windows-10-home-hp-systems-solved/ Enable virtualization on HP

[maxheld83]

maybe also add screenshots of how to set this up on windows, and how to get rocker/verse to work.

[maxheld83]

so just adding the link would be pass/fail, also providing screenshots and a bit of an explanation and how to use this with rocker/verse (password etc) would be graded-1.

Also, it'd probably be wise to kinda advise against this given the bad experiences with it.

If people can't install "real" docker (the current applications) on their machine, then probably rstudio.cloud is for them.
And we can't really support the toolbox stuff, takes up too much time.
Still it'd be nice to document it to give people a head start on how to get it working.

Because of the overall bad experience, it's probably not a priority item.