fix: update Docusaurus config for custom domain (#20)

Update url and baseUrl for hindsight.vectorize.io custom domain.
With custom domains, GitHub Pages serves from root path instead of
project subdirectory.

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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

hindsight-docs/docusaurus.config.ts

@@ -16,8 +16,8 @@ const config: Config = {
     mermaid: true,
   },
 
-  url: 'https://vectorize-io.github.io',
-  baseUrl: '/hindsight/',
+  url: 'https://hindsight.vectorize.io',
+  baseUrl: '/',
 
   organizationName: 'vectorize-io',
   projectName: 'hindsight',