Use websockets to communicate with URL shortener
This is an idea from @leonekmi
Instead of publishing through the REST API with a TTL we'd better open a websocket with KMServer.
- We wouldn't have to store anything anymore in database on KMServer's side, everything could be in memory
- Closing the websocket = KM App shutting down, so going to kara.moe could effectively redirect to kara.moe/base
This is an inter project issue. It's no big hurry but also not a whole ton of work (it's more dev on KM Server, actually)