Express session-store memory-leak

[fcaps]

starting the docker image with "NODE_ENV=production" was logging something we should pay attention to.

Warning: connect.session() MemoryStore is not
designed for a production environment, as it will leak
memory, and will not scale past a single process.

could be fixed with something like this, but didn't had the time to dive into it.

[fcaps]

update:
working locally with a in-memory sessions is a PITA, if nodemon detects a change in the code it reloads the server, resulting in a session loss -> so, every time you have to work on something with a logged in user in the frontend, you need to login again.

Options 1:
local persistence, something like FileStorage

Option 2:
using a external service (maria, redis etc.), see list of supported backends

Option 3:
mixed backends for local-dev and production, local=FileStorage, production=InMemory.