Dockerized shibboleth service provider for SIGPwny authorization

How it works TL;DR:

• App is proxy-protected by shibboleth.
• When they sign in, we store their uid and affiliation (student, alum, etc) in their session.
• We then redirect them to discord OAuth to get their discord account
• Discord bot changes their role based on their affiliation

Changes to make for your own app (run your own service provider)

shibboleth2.xml:

• In the line <ApplicationDefaults entityID=https://sp.example.org/shibboleth>: Replace https://sp.example.org with your entity ID.
• In the line <Errors supportContact=consult@illinois.edu>: Replace consult@illinois.edu with the appropriate support email address for services on this server.

attribute-map.xml:

• Uncomment your required attributes

Dockerfile:

• Change shib-keygen cmd to use your entityID instead