Northflank build of master fails on wrong npm version in package.json

[Apslooper]

Describe the bug
Northflank build as described in http://nightscout.github.io/vendors/northflank/new_user/ failes on wrong npm package version in package.json

Steps reproduce

1. Go to northface.com
2. Build from ‘master’
3. Build fails on invalid npm version in package.json
4. Fixed it bij manually changing the npm package version to 8.19.4

Screenshots

[Apslooper]

[psonnera]

Have a look at the documentation, it's now documented nightscout/nightscout.github.io@de3eda7 and regarding the move to recent version, it's easily said but requires some work. #7417