fix: update root _config.yml for custom domain

- Set baseurl to empty string for custom domain
- Set url to https://docs.specfact.io
- Exclude assets/ from permalink pattern to fix CSS paths
- This file is copied to docs/ by GitHub Pages workflow, so it must match docs/_config.yml

Fixes CSS 404 error: /specfact-cli/assets/main.css -> /assets/main.css

Author: djm81

_config.yml

@@ -4,8 +4,8 @@
 title: SpecFact CLI Documentation
 description: >-
   Complete documentation for SpecFact CLI - Brownfield-first CLI: Reverse engineer legacy Python → specs → enforced contracts.
-baseurl: "/specfact-cli"  # Project pages require baseurl
-url: "https://nold-ai.github.io"  # GitHub Pages domain
+baseurl: ""  # Custom domain at root, no baseurl needed
+url: "https://docs.specfact.io"  # Custom domain
 
 # Build settings
 markdown: kramdown
@@ -51,17 +51,16 @@ defaults:
       type: pages
     values:
       layout: default
-  # Apply permalink pattern only to markdown files
+  # Apply permalink pattern only to markdown files (exclude assets)
   # Note: SCSS files with front matter are treated as pages and inherit this pattern
-  # This causes CSS to be output at main/index.css instead of assets/main.css
-  # We fix this in the GitHub Pages workflow by copying the CSS to the correct location
+  # We exclude assets/ directory to prevent CSS from being output at main/index.css
   - scope:
       path: ""
       type: pages
+      exclude:
+        - "assets/**"
     values:
       permalink: /:basename/
-    # Only apply to files that are actually markdown, not SCSS
-    # Jekyll will still process SCSS as assets if they're in assets/
   - scope:
       path: "getting-started"
     values: