ADD: freesurfer build from source

[kaczmarj]

Potentially use https://github.com/corticometrics/fs-docker as an example.

[pwighton]

I've been working on this: https://github.com/pwighton/neurodocker/tree/20210825-refactor

It's a mess right now, but mostly works :)

[djarecka]

@pwighton - do you think you have version that could be added to the main repository? are you still working on it?

[pwighton]

@djarecka, there is a PR for this here, but it could use a revisit.

I'm on vacation next week, but will try to look at it when I get back.

[github-actions]

This issue is stale because it has been open for 30 days with no activity.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.