Upgrade webserver dependencies (tracking issue)

[stephdl]

Why

This issue tracks recent dependency upgrades for NethServer/ns8-webserver, required for security, stability, and future-proofing the service.

Purpose

Maintain ns8-webserver up-to-date and compatible with latest features and images.

Proposed upgrades

• Node.js version bump: chore(deps): update node.js to v24
• PHP docker image update: chore(deps): update php docker tag
• SFTPGo docker image update: chore(deps): update drakkan/sftpgo docker tag to v2.7.0

Each referenced PR provides release notes and technical details.

Alternative solutions

• Delay upgrades if breaking changes or stability risks arise in downstream integration.
• Limit upgrades to critical security and bug fixes if needed.

Additional context

• PRs successfully merged and tested in CI.
• Release testing and changelogs referenced in each PR.

See also

• Changelogs and upgrade notes in referenced PRs.

[stephdl]

QA

target is 1.2.0-dev.1

• test the upgrade from stable to testing
• test the upgrade of sftpgo to 2.7.0, basic functionalities must be workable (login with default 9001:9001, upload of files, etc)
• test the php upgrade 8.3.28-fpm-bookworm 8.4.15-fpm-bookworm
• test the UI of cluster-admin

[mrmarkuz]

Test case "Upgrade" verified

[stephdl]

released https://github.com/NethServer/ns8-webserver/releases/tag/1.2.0