Fix.

.github/workflows/build-docs.yml

@@ -61,7 +61,7 @@ jobs:
           artifact-upload: 'false'
 
       - name: Debug
-        run: cd ${{ steps.init.outputs.build-html }} && ls -la
+        run: cd /github/workspace/home/runner/work/_temp/docsbuild/build/html && ls -la
 
       - name: Set environment variables.
         run: |
@@ -78,6 +78,7 @@ jobs:
           dir: "/home/runner/work/_temp/docsbuild/build/html"
           chunk-size: 20
           skip-purge: true
+          enable-index-html: true
 
       - name: Purge the QuantCDN cache
         uses: quantcdn/[email protected]