Add info for trmm-nats errors

[joeldeteves]

Per convo with @wh1te909 (feel free to assign this one to me).

It would be helpful to provide documentation for the following error in the NATS logs:
[17] 2022/11/02 05:35:50.090254 [ERR] 10.244.0.13:47958 - cid:533 - "v2.2.0:python3" - authentication error - User "tacticalrmm"

Suggested info to include:

• This means django cant access the nats container or the the nats-rmm.conf file is not being shared or readable
• This is a container communication issue or filesystem sharing issue
• tacticalrmm is the django nats user