feat(docs): two-product shell and the approved tagline (WS4)

[defang-sam]

Warning

Ready for review, but NOT ready to merge.

This PR puts the product names on public surfaces, and they are not announced yet. Merging publishes them. Please review and approve, then leave it for the announcement.

Why

Two things: the docs carried a tagline nobody decided on, and they had no room for a second product.

1. There was a fourth tagline

docusaurus.config.js:20 read:

"A radically simpler way to build and deploy production-ready cloud apps"

That is not the company tagline, not the product tagline, and not the retired Cloud, Simplified. It is a fourth line. Replaced with the product tagline — the docs serve developers, so that is the right level, and it invents nothing.

2. Two-product shell — ADD, do not move

Every one of the 84 existing doc URLs is unchanged. No entry in redirects.json was touched, and no new redirect was needed. Moving instead of adding would have meant ~84 new redirects on top of the 49 already there.

The five sections that were top-level navbar items are now grouped in a Deploy dropdown:

Before (navbar)	After (navbar)
Overview, Tutorials, Concepts, Providers, CLI	Deploy ▾ (Overview, Tutorials, Concepts, Providers, CLI)
—	Station

Added docs/station/station.mdx at /docs/station plus a stationSidebar. It says plainly that Station is in development, and contrasts the two products so a reader who lands there is not confused.

Verification

Local docusaurus build: exit 0.

Check	Result
/docs/intro, /docs/concepts, /docs/tutorials, /docs/providers	all still build
/docs/station	builds
Rendered navbar on /docs/intro	one Deploy dropdown + one Station, with the five sections inside

One thing reviewers should know

npm run build runs scripts/prebuild.sh, which needs Go to generate docs/cli. Without Go the CLI sidebar is empty and then every page fails to render:

DocSidebarNavbarItem: Sidebar with ID "cliSidebar" doesn't have anything to be linked to.

That reproduces on clean main (89 failing paths there, 90 here — the extra one is the new Station page failing for the same reason). It is environmental, not caused by this change. I verified my change by stubbing docs/cli locally, building green, then removing the stub. docs/cli/.gitignore and _category_.json are untouched in the final diff.

Context

• DefangLabs/defang-global#135 — the naming source of truth, including which tagline each surface takes
• DefangLabs/defang-mvp#3232 — WS3, the website side
• Plan and open items: SAM idea 01M1YE64QV7YFRA2B1B7YG9AWR

🤖 Generated with Claude Code

[defangdevs]

Reviewed the diff (docs/station/station.mdx, docusaurus.config.js, sidebars.js) against DefangLabs/defang-global#135 (merged naming source of truth):

• Tagline: docs/station.mdx and docusaurus.config.js use "Develop Once, Deploy Anywhere." — matches the Defang Deploy product-level tagline in the guide exactly (right level for a developer-facing surface).
• Navbar: all 5 previously top-level items keep their existing routes/sidebar IDs unchanged, just regrouped under a new "Deploy" dropdown — confirms no redirects were needed.
• stationSidebar → docs/station wired correctly in sidebars.js; single-page autogenerated sidebar doesn't need a _category_.json.
• CI green (Analyze, CodeQL, Test deployment).

No blocking issues. Agreed this should sit unmerged until the announcement per the PR warning — not merging.