v2026.04.18

Upstream changes

• Bump the Alpine base image to 3.23.4.
• Fix a 'booleanNot.alwaysTrue' PHPStan finding
• Bump 'chillerlan/php-qrcode' to 6.0.1
• Remove a few unused variables.
• Merge pull request #281 from Terrance-forks/local-dir-env-vars
• Drop unused root args on internal methods
• Docker: Bump nginx in /.docker/web-nginx (#291)
• Docker: Bump nginx in /.docker/web-nginx (#284)
• Merge pull request #289 from tt-rss/skip-unnecessary-pw-change
• Allow nginx to gzip responses (#290)
• Add a temporary PHPStan ignore in 'Article'.
• When using the CLI, only set a user password if it's changed.
• Add environment overrides for local folders