[NodeJS][LTS] LTS version are never properly supported by the infra

# Reminder: Goal is to have LTS available when it's active

EDIT: 13/02/2026

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Is your feature request related to a problem? Please describe:
Docs page still mentioned Node 20 as "preview" while Node 22 is already LTS in 1 month:

Describe the solution you'd like:
`node:20` should be / habe been the default since October 2023
`node:22` should already be supported in `preview`
that's why Node create STS version
and they also make `current` for future LTS, so that team owning a responsibility such as the azure backplane of maintaining the tooling should use that `CURRENT LTS` delay (or before) to start implemeting as preview the integration for the underlying customer

Describe alternatives you've considered:
There is none, the SWA backplane is owned by the Azure team + the Azure cli team

Additional context:
updating frontend application heavily depends on Node version on each major update of Next/Remix/.....