Update PR template

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,13 +1,28 @@
-> Please send your pull requests the develop branch.
+Hello and thank you for wanting to contribute to the MagicMirror project
-> Don't forget to add the change to CHANGELOG.md.
+
+**Please make sure that you have followed these 4 rules before submitting your Pull Request:**
+
+> 1) Base your pull requests against the `develop` branch.
+>
+>
+> 2) Include these infos in the description:
+>  * Does the pull request solve a **related** issue?
+>  * If so, can you reference the issue like this `Fixes #<issue_number>`?
+>  * What does the pull request accomplish? Use a list if needed.
+>  * If it includes major visual changes please add screenshots.
+>
+>
+> 3) Please run `npm run lint:prettier` before submitting so that
+> style issues are fixed.
+>
+>
+> 4) Don't forget to add an entry about your changes to
+> the CHANGELOG.md file.
+
 
 **Note**: Sometimes the development moves very fast. It is highly
 recommended that you update your branch of `develop` before creating a
 pull request to send us your changes. This makes everyone's lives
 easier (including yours) and helps us out on the development team.
-Thanks!
 
-- Does the pull request solve a **related** issue?
+Thanks again and have a nice day!
-- If so, can you reference the issue?
-- What does the pull request accomplish? Use a list if needed.
-- If it includes major visual changes please add screenshots.