Issue title: Document network connectivity particularities
 Issue body: * [ ] Using Moon with DNS settings where short domain names are forbidden:
```
  dnsConfig:
    nameservers:
      - 116.69.203.115
    searches:
      - ns1.svc.cluster-domain.example
      - my.dns.search.suffix
```
* [ ] Document how to configure Ingress to correctly proxy websockets for UI
 Comments: 
 Comment 0: Fixed.
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