Update contributing.md

Author: justin808

docs/contributor-info/contributing.md

@@ -1,6 +1,17 @@
 # Tips for Contributors
 *See [Releasing](./releasing.md) for instructions on releasing.*
 
+## Sumary
+
+For non-doc fixes:
+
+* Provide changelog entry in the [unreleased section of the CHANGELOG.md](https://github.com/shakacode/react_on_rails/blob/master/CHANGELOG.md#unreleased).
+* Ensure CI passes and that you added a test that passes with the fix and fails without the fix.
+* Squash all commits down to one with a nice commit message *ONLY* once final review is given. Make sure this single commit is rebased on top of master.
+* Please address all code review comments.
+* Ensure that docs are updated accordingly if a feature is added.
+
+
 ## To run tests:
 * After updating code via git, to prepare all examples and run all tests: