README: update how to build the documentation locally (#2584)

2025-10-26 09:06:45 +02:00 · 2025-10-26 09:06:45 +02:00 · 8e0291a7ae
parent 3bc886d6c1
commit 8e0291a7ae
1 changed files with 1 additions and 0 deletions
--- a/README.md
+++ b/README.md
@ -95,6 +95,7 @@ rvm install ruby-3.3.2
 Next, you can build & serve the documentation preview:

 ```shell script
+npm install           # This needs to be run once for initialization
 npm run serve-preview
 ```