- Wrap some lines
- Normalize reference anchors to conform to hierarchy
- Mention that the certificates will be renewed
- Strengthen suggestion to use Let's Encrypt
Fixes#305
Removes a lot of 'sudo -E' usage, and eventually should
let us get rid of the $PATH override for jupyterhub-admins,
which arguably is less secure than just dropping stuff into
/usr/bin
Also remove sudo -E from apt and mkdir calls. Not necessary.
