Read calendar event creators from the admin module, and archive the old ones (#14)

Reviewed-on: #14
Co-authored-by: Patrick Müller <mail@pmueller.me>
Co-committed-by: Patrick Müller <mail@pmueller.me>

src/models/admin/admin.auth.ts

@@ -33,7 +33,11 @@ const localhostOrigins = [
 	'http://localhost:3000',
 	'http://localhost:3001',
 	'http://localhost:3002',
-	'http://localhost:3003'
+	'http://localhost:3003',
+	// The Angular calendar frontend; `ng serve` defaults to 4200. Missing from
+	// this list, sign-out from the calendar answers 403 in dev only, which is a
+	// confusing thing to debug against a production config that is fine.
+	'http://localhost:4200'
 ];
 
 const trustedOrigins = isProd