Update README.md

Author: hugoabernier

README.md

@@ -66,8 +66,9 @@ For example, the CSS provided above will make the feedback button appear as foll
 ### Build the solution
 
 1. clone repo
-2. Run `gulp bundle --ship`
-3. Run `gulp package-solution --ship`
+2. Ryn `npm install`
+3. Run `gulp bundle --ship`
+4. Run `gulp package-solution --ship`
 
 ### Manual deployment