vienna

When users submit content, e.g. create new rooms, they can add urls. If these urls don't start with http:// clicking on them results in a 404 – the browser tries to find that page on our site instead of opening a new site.

See e.g. [this page](https://www.imgraetzl.at/wien/raumteiler/raum/biete-auslagenflache-prasentationstische-ausstell

Description

When setting the DB_FILE_PATH key in the .env file to ":memory:" or :memory:, an sqlite3.OperationalError is raised on every query:

Ignoring exception in on_message
Traceback (most recent call last):
  File "/home/max/PycharmProjects/SAM/venv/lib/python3.9/site-packages/discord/client.py", line 343, in _run_event
    await coro(*args, **kwargs)
  File "