Feature/comp 208 google o auth poc

Add support for authentication with OAuth2 providers (using Google as a provider for testing, the final app should use Eduteams)

It's still WIP - user model and simple role-based access has to be created (e.g. allowing someone to sign in, but disallowing them from editing things until manually approved somehow)

compendium_v2/__init__.py

@@ -39,6 +39,7 @@ def _create_app(app_config) -> Flask:
 
     app.config['CONFIG_PARAMS'] = app_config
     app.config['SECRET_KEY'] = app_config['SECRET_KEY']
+    app.config['SESSION_COOKIE_SECURE'] = True
     if 'oidc' not in app_config:
         app.config['LOGIN_DISABLED'] = True
         logger.info('No OIDC configuration found, authentication disabled')