Add missing command in site README

Kobzol · web-flow · commit 8a1c8d2eb719 · 2023-05-26T08:32:09.000+02:00
diff --git a/site/README.md b/site/README.md
@@ -20,6 +20,7 @@ You can build the website in multiple ways:
   
   # Build frontend
   $ cd site/frontend
+  $ npm install
   $ npm run build
   
   # Build website binary
