Document SSO

I talked with Mark today about documentation. We agreed on having the same structure like openappstack, a docs/ dir which can be rendered with sphinx. We should try to have this project as independent as possible so it works on it's own, so it should also have it's own documentation. Does this make sense ?

Imo it should include:

• A docker-compose.yml file which brings up a demo SSO env (user-panel, hydra, login-provider und consent-provider), with pre-seeded users/config and working out of the box.
• An additional application docker compose file (i.e. Nextcloud bundled with OIDC plugin, already configured in hydra) (this is done with the login_logout example app)
• Documentation
  • how to add additional apps
  • how to use the user panel
  • What the different components are and how they work together