Update README.md

added contributing info

Author: lbhopper

README.md

@@ -46,4 +46,12 @@ Message limits are checked after each push with the following request:
 ![requests](https://github.com/BloodieToes/ruby-push/blob/main/requests.png?raw=true)
 
 # opt directory
- Contains notification images that can be used as visuals (optional).
+ Contains notification images that can be used as visuals (optional)
+
+# Contributing
+1. Fork the repo
+2. Switch to the dev branch: `git checkout dev`
+3. Create your feature branch: `git checkout -b your-feature-name`
+4. Commit your changes: `git commit -am 'your added feature'`
+5. Push to the branch: `git push origin your-feature-name`
+6. Create a new Pull Request against the `dev` repo