docs(contributing): Added reporting and pull request related parts

CONTRIBUTING.md

@@ -1,7 +1,24 @@
 # Contributing
 
+We are open to, and grateful for, any contributions made by the community.
 Thanks for your interest in contributing! Here's a few things to keep in mind when contributing to this project:
 
+## Reporting issues and asking questions
+
+Before opening an issue, please search the [issue tracker](https://github.com/skolmer/i18n-tag-schema/issues) to make sure your issue hasn’t already been reported.
+
+**We use the issue tracker to keep track of bugs and improvements** to es2015-i18n-tag itself, its examples, and the documentation. We encourage you to open issues to discuss improvements, architecture, internal implementation, etc. If a topic has been discussed before, we will ask you to join the previous discussion.
+
+For support or usage questions, please search and ask on [StackOverflow with a `es2015-i18n-tag` tag](https://stackoverflow.com/questions/tagged/es2015-i18n-tag). We ask you to do this because StackOverflow has a much better job at keeping popular questions visible. Unfortunately good answers get lost and outdated on GitHub.
+
+## Sending a pull request
+
+For non-trivial changes, please open an issue with a proposal for a new feature or refactoring before starting on the work. We don’t want you to waste your efforts on a pull request that we won’t want to accept.
+
+Please try to keep your pull request focused in scope and avoid including unrelated commits.
+
+After you have submitted your pull request, we’ll try to get back to you as soon as possible. We may suggest some changes or improvements.
+
 This project uses `ghooks` to run `commit-msg` and `pre-commit` hooks.
 
 ## semantic-release