In some cases the `renderer` and `registrar` run into a race condition when one is creating the shared instance. Sometimes, service that does not set up the instance starts with a half configured `settings.py` leading to strange bugs. Using a service dependency does not work, as e.g the `renderer` will not always be present. Ideas for a solution: - using a per-container instance: - pros: - reliable instance creation/configuration - database as synchronization out of the box - cons: - duplication of files (especially static seems to be > 4GB; but actually unnecessary) - spinup times increased (how much?) - sticking to shared instance, with better synchronization