✨(frontend) feature versioning

We can now see the version of the document
and navigate to different versions.
Collaboration is possible per version.

src/frontend/apps/impress/conf/default.conf

@@ -8,6 +8,10 @@ server {
       try_files $uri index.html $uri/ =404;
   }
 
+  location ~ ^/docs/(.*)/versions/(.*)/$ {
+    error_page 404 /docs/[id]/versions/[versionId]/;
+  }
+
   location /docs/ {
     error_page 404 /docs/[id]/;
   }