docs: canonical and Open Graph URLs use the wrong host

What happened

The deployed documentation site publishes canonical and Open Graph URLs on the Termix product host instead of the documentation host.

Evidence

docusaurus.config.ts sets:

url: 'https://termix.site',
baseUrl: '/',

However, the documentation is deployed at https://docs.termix.site. The rendered installation page currently contains:

<meta property="og:url" content="https://termix.site/install">
<link rel="canonical" href="https://termix.site/install">

The page itself is served from https://docs.termix.site/install, so these metadata URLs identify a different host and may cause incorrect canonicalization and link previews.

Expected behavior

The canonical and Open Graph URLs for documentation pages should use https://docs.termix.site.

Suggested fix

Set the Docusaurus url to https://docs.termix.site, rebuild/deploy the site, and verify the generated canonical, og:url, and sitemap URLs on a representative docs page.

Start in docusaurus.config.ts at the url and baseUrl settings. Rebuild or deploy the documentation site, then inspect a representative page such as /install and verify that its canonical, og:url, and sitemap URLs use https://docs.termix.site rather than the product host.