Support Keycloak

Matcharequested to merge
feature/support-keycloak into develop
  • add keycloakEnabled parameter to the discussion preferences
  • add Keycloak to the social login modules (this needs to be refactored if we keep using it because now it's a big list of static components and that's plain ugly)
  • add proxying of /complete/* routes to the backend

Related to: assembl!930 it needs this on the backend side to work.

Edited by Matcha

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