Replaces the bare install snippet with a five-minute walkthrough that
matches the redesigned UI. Leads with a docker-compose.yml block (the
bare docker run command is collapsed in an Accordion), keeps the 1:1
path rule, and adds two new sections that show the user what happens
on first boot.
Adds two screenshots at 1920x900 dark theme:
- setup-cold-start.png: the Cold start card with Username, Password,
Confirm password fields, and the Initialize console button.
- dashboard.png: the post-sign-in dashboard captured against v0.72.0
with the full top nav (Home, Fleet, Resources, App Store, Logs,
Auto-Update, Console, Audit, Schedules) and the populated Stack
health table sorted by load.
Where-to-next now uses CardGroup cols=2 to match the introduction
page's pattern.
SaelixCode