fix: correct build path for Docusaurus deployment

  - Build docs in docs/ directory
  - Upload artifact from docs/build
  - Fix 'build: Cannot open' error

Author: tosin2013

.github/workflows/deploy-docs.yml

@@ -26,17 +26,21 @@ jobs:
         with:
           node-version: '20'
           cache: 'npm'
+          cache-dependency-path: 'docs/package-lock.json'
 
-      - name: Install dependencies
+      - name: Install root dependencies
         run: npm ci
 
-      - name: Build website
-        run: npm run build
+      - name: Build documentation
+        run: |
+          cd docs
+          npm ci
+          npm run build
         
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
-          path: ./build
+          path: ./docs/build
 
   deploy:
     environment: