change readme.md

Readme.md

@@ -38,8 +38,8 @@ grunt
 ```
 * Submit a merge request on icat repository at https://gitlab.esrf.fr/icat/doi-landing-page
 
-### How to prepare the docker container
-* check js files, concatene them, minify them, handle other js dependancies
+### How to prepare the docker container locally for testing purpose
+* Make sure the porject is prepared for production (check js files, concatene them, minify them, handle other js dependancies)
 ```
 grunt
 ```