From b910721f5f1666ae8a7b012fcd7806a6af97c374 Mon Sep 17 00:00:00 2001
From: Kristiyan Katsarov <me@katsarov.info>
Date: Sun, 13 Oct 2019 09:07:02 +0200
Subject: [PATCH] add note about installing and verifying the server extension
 (#420)

* add note about installing and verifying the server extension, as it is needed for jupyterlab

* Update CONTRIBUTING.md

Fix typo as suggested from @jtpio

Co-Authored-By: Jeremy Tuloup <jeremy.tuloup@gmail.com>
---
 CONTRIBUTING.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 72b577b97..7aab8512c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -81,6 +81,18 @@ Node.js is required and can be installed with conda:
 conda install -c conda-forge nodejs
 ```
 
+The JupyterLab extension requires the server extension to be enabled. This can be done by running:
+
+```bash
+ jupyter serverextension enable voila --sys-prefix
+```
+
+You can verify if the server extension is enabled by running:
+
+```bash
+jupyter serverextension list
+```
+
 To install the JupyterLab extension locally:
 
 ```bash