docs(faq): Cornerstone EEIO 2026 FAQ

.github/workflows/pr.yml

@@ -1,7 +1,8 @@
 # Build every PR, publish a preview, and check links.
 # Previews are served from this repo's gh-pages branch at
-#   https://cornerstone-data.github.io/eeio-docs/pr-preview/pr-<number>/
-# (or under docs.cornerstonedata.org/eeio-docs/ once the hub has its custom domain).
+#   https://docs.cornerstonedata.org/pr-preview/pr-<number>/
+# (this repo's Pages site has the custom domain docs.cornerstonedata.org, so the
+# base path is /pr-preview/pr-<number>, not /eeio-docs/...).
 name: PR build and preview
 on:
   pull_request:
@@ -17,7 +18,7 @@ jobs:
   build-preview:
     runs-on: ubuntu-latest
     env:
-      BASE_URL: /eeio-docs/pr-preview/pr-${{ github.event.number }}
+      BASE_URL: /pr-preview/pr-${{ github.event.number }}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4