Add Dex to the prerequisites and add a note that to query for the groups
scope the user must set the organizations Dex should search against.
Otherwise the groups claim would be empty. This is because of the format
group claims are represented, i.e. "org:team".
Signed-off-by: Radoslav Dimitrov <dimitrovr@vmware.com>
The following guide describes the process of configuring Supervisor
with Dex and identify users through their Github account. Issue #415
Signed-off-by: Radoslav Dimitrov <dimitrovr@vmware.com>
