Update readme

README.md

@@ -11,3 +11,14 @@
   * Install Node.js dependencies with `cd assets && npm install`
   * Start Phoenix endpoint with `mix phx.server`
 
+## Development
+
+I implemented a git hook for add some valuable tools, so please for development then to clone this repo, run the *install_credo_hooks.sh* script. This script will install a *pre-push* git hook in this repo.
+
+#### How it works?
+The main goal for this hook is run credo before to make a push to the remote repository, if there are some credo suggestions, the push will be stopped, if you don't have suggestions the push will be uploaded.
+
+Example
+![](https://p10.f2.n0.cdn.getcloudapp.com/items/E0ulxmr7/Screen+Recording+2019-09-22+at+10.45+AM.gif?v=ce3356bd814b7d32783fd66a6e18168c)
+
+I made this for ensure quality in the code analysis made by *Credo*