Update contributing.md

Author: atthaboon

contributing.md

@@ -5,20 +5,43 @@ or slack with the owners of this repository before making a change.
 
 Please note we have a code of conduct, please follow it in all your interactions with the project.
 
-## Pull Request Process
-In progress ...
+## Submitting issues
 
-## Code of Conduct
-In progress ...
+Bugs and enhancements are tracked in the `issue tracker`_.
+Before submitting a new issue, it is always a good idea to check is the
+same bug or enhancement already reported. If it is, please add your
+comments to the existing issue instead of creating a new one.
 
-## Release steps
-Please follow the release steps for ensure that all release will be in the same standard and pattern.
+## Reporting bugs
 
-In progress ...
+Explain the bug you have encountered so that others can understand it
+and preferably also reproduce it. Key things to have in good bug report:
 
-### Step for regenerate keywords documents  
-Command for Generate document
+-  Python version information
+-  PuppeteerLibrary and Robot Framework version
+-  Steps to reproduce the problem. With more complex problems it is
+   often a good idea to create a short, self contained and example.
+-  Possible error message and traceback.
 
-    python -m robot.libdoc -f html PuppeteerLibrary docs/PuppeteerLibrary.html
+Notice that all information in the issue tracker is public. Do not
+include any confidential information there.
 
+## Enhancement requests
+
+Describe the new feature and use cases for it in as much detail as
+possible in an issue. Especially with larger enhancements, be prepared to
+contribute the code in form of a pull request as explained below or to
+pay someone for the work. Consider also would it be better to implement this
+functionality as a separate library outside the PuppeteerLibrary.
+
+## Pull requests
+
+On GitHub pull requests are the main mechanism to contribute code. They
+are easy to use both for the contributor and for person accepting the
+contribution, and with more complex contributions it is easy also for
+others to join the discussion. Preconditions for creating a pull
+requests are having a `GitHub account`, installing `Git` and forking the
+`PuppeteerLibrary project`. 
+
+Please always ensure that all test pass before create a pull request.