[uptime-kuma] Guide needs update

[Hannsre]

Hi,

not sure what the best solution is, so I didn't create a PR right away.

When creating a new asteroid for uptime kuma I noticed the guide seems out of date.
In step 2 for the prerequisites it says to run npm install npm@latest -g

Which results in this output:

[hrms01@mirfac ~]$ npm install npm@latest -g
npm error code EBADENGINE
npm error engine Unsupported engine
npm error engine Not compatible with your version of node/npm: npm@11.2.0
npm error notsup Not compatible with your version of node/npm: npm@11.2.0
npm error notsup Required: {"node":"^20.17.0 || >=22.9.0"}
npm error notsup Actual:   {"npm":"10.8.2","node":"v18.20.6"}
npm error A complete log of this run can be found in: /home/hrms01/.npm/_logs/2025-03-26T08_23_50_366Z-debug-0.log

While it should be:

+ npm@8.3.0
added 169 packages from 86 contributors, removed 157 packages and updated 45 packages in 22.432s

or similar.

Switching to node 20 does fix this and npm install npm@latest -g works:

[hrms01@mirfac ~]$ uberspace tools version use node 20
Selected Node.js version 20
The new configuration is adapted immediately. Minor updates will be applied automatically.

[hrms01@mirfac ~]$ npm install npm@latest -g

added 1 package in 7s

24 packages are looking for funding
  run `npm fund` for details

but now uptime kuma warns me about using an unsupported npm version:

HEAD is now at 5bb329fa Update to 1.23.16
npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE   package: '@azure/msal-node@1.18.4',
npm warn EBADENGINE   required: { node: '10 || 12 || 14 || 16 || 18' },
npm warn EBADENGINE   current: { node: 'v20.18.3', npm: '11.2.0' }
npm warn EBADENGINE }

It does work eventually, but it's not ideal.

Looks to me like the installed NPM Version is too new to update Node 18?