Added Contributing.md

Author: BreadEaterYT

CONTRIBUTING.md

@@ -0,0 +1,15 @@
+## JavaPHP Contribution
+
+If you have skills in Java you can contribute as much as you want !
+
+### How can you help ?
+- Report bugs in the <a href="https://github.com/BreadEaterYT/JavaPHP/issues">Issues</a>
+- Refactor / Clean up the code
+- Add new features (When creating a new feature, please write tests for your feature and provide good documentation)
+
+### Get Started
+- Fork the repository
+- Do what you want add or modify
+- Do a Pull Request
+
+Note: Modifications of Markdown files, LICENSE, or any files that aren't code does not count !