Add NODE_OPTIONS env var to npm install

[hardillb]

part of #194

Description

Set the max-old-space for npm when doing the initial install to try and prevent the process getting killed by the OOM reaper (or at least try and limit heap size to with in the bounds)

Related Issue(s)

part of #194

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Backport needed? -> add the backport label
• Includes a DB migration? -> add the area:migration label

[hardillb]

I need to test this a bit more on Docker and my local Kube, but it should help.

[hardillb]

Deleting because

$NODE_OPTIONS="--max-old-space=256" npm install 
/usr/bin/node-18: --max-old-space= is not allowed in NODE_OPTIONS