Document Ubuntu VM install issues

[robmarkcole]

Collecting pyyaml==5.4.1 (from iris==0.0.0)
  Downloading PyYAML-5.4.1.tar.gz (175 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 175.1/175.1 kB 26.3 MB/s eta 0:00:00
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error

Solution: pyyaml>=5.4.1

That's it!

[robmarkcole]

However when I run the app, it repeatedly rejects my password, even when I create a new account via the UI and attempt to access that.

Verifying it exists:

Tried to get around this by commenting out all the @requires_auth but then get KeyError: 'user_id'