Set animation for loading only (#19)

* Set all envs to animate on loading only

* Update Readme.md & publics

* Remove spaces in files

* Create gifs & Update ReadMe.md

README.md

@@ -26,7 +26,7 @@ Repeate for each styles you want to enables.
 * `PERF banner.css`: Change the Load Testing banner and login's footer
   ![example of PERF banner](public/PERF_banner.jpg)
 * `PROD banner.css`: Change the Production banner and login's footer
-  ![example of Prod banner](public/PROD_banner.jpg)
+  ![example of Prod banner](public/PROD_banner_animated.gif)
 * `Whiter banner.css`: Look & feel, mainly changing text to pure white and the hover and active elements. A _must have_. Works with the others files.
 * `Sigils.css`: Change the top-right user icon to a Shop or Factory depending on if you are logged as ar Retailer or a Supplier.
   * ![example of orange shop icon](public/user-orange-shop.png) ![example of violet factory icon](public/user-violet-factory.png)