Updated

Author: Manuel Cervantes

CONTRIBUTING.md

@@ -3,22 +3,26 @@
 Please read these guidelines before contributing code.
 
 ## :nut_and_bolt: Setting up the development environment
+
 - Fork and clone the repository
 - `npm install`
 - `npm run watch`
 - To update js and css files, use the `src` folder: src/js/glightbox.js and src/postcss/glightbox.css These files will be compiled automatically with every change to the `dist` folder (do not modify the dist files directly)
 
 ## :bug: Fixing a Bug
-When fixing a bug please make sure to test it in several browsers including ie11. If you are not able to do so, mention that in a PR comment, so other contributors can do it.
+
+When fixing a bug please make sure to test it in several browsers including ie11. If you are not able to do so, mention that in a PR comment, so other contributors can do it. once your code is working please run the following command "eslint src/js" to verify that your code is following the same coding standards
 
 ## :tada: Proposing a Change
-When implementing a feature please create an issue first explaining your idea and asking whether there's need for such a feature.
-Remember the script's core philosophy is to stay simple and minimal, doing one thing and doing it right.
+
+When implementing a feature please create an issue first explaining your idea and asking whether there's need for such a feature. Remember the script's core philosophy is to stay simple and minimal, doing one thing and doing it right.
 
 ## :pencil: Before you open a Pull Request
-- Follow Git best practices (especially use meaningful commit messages).
+
 - Follow the same conding style.
+- Run eslint to verify your code, run the following command "eslint src/js" and fix any error you find in your code
 - **DO NOT** commit changes in the dist directory, this files are created automatically.
+- Follow Git best practices (especially use meaningful commit messages).
 - Describe thoroughly you work in a PR comment.
 - Be patient and understanding. It's a side project, done in free time.