redis-server (and other base packages) can pull in tzdata as a fresh
dependency on a box that's never configured it, which prompts
interactively (geographic area / city) and hangs the installer with
no TTY attached -- confirmed by reproducing the hang in a clean
container. DEBIAN_FRONTEND=noninteractive avoids it, matching the
same fix applied to sso-manager-node's install.sh.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
wmantly
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