fix: add Vercel deploy config and workflow for docs site

.github/workflows/docs.yml

@@ -46,7 +46,8 @@ jobs:
       - name: Build docs
         run: mkdocs build
 
-  deploy:
+  deploy-github-pages:
+    name: Deploy GitHub Pages
     if: github.event_name != 'pull_request'
     runs-on: ubuntu-latest
     permissions:
@@ -73,3 +74,33 @@ jobs:
 
       - name: Build and deploy
         run: mkdocs gh-deploy --force
+
+  deploy-vercel:
+    name: Deploy Vercel Docs
+    if: >-
+      github.event_name != 'pull_request'
+      && github.ref == 'refs/heads/main'
+      && github.repository_owner == 'headroomlabs-ai'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: '20'
+          cache: npm
+          cache-dependency-path: docs/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+        working-directory: docs
+
+      - name: Deploy to Vercel
+        run: npx vercel deploy --prod --token=${{ secrets.VERCEL_TOKEN }}
+        working-directory: docs
+        env:
+          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
+          VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}

docs/vercel.json

@@ -0,0 +1,6 @@
+{
+  "framework": "nextjs",
+  "buildCommand": "next build",
+  "outputDirectory": ".next",
+  "installCommand": "npm install"
+}