Create "Contributing Guide"

CONTRIBUTING.md

@@ -0,0 +1,39 @@
+# Contributing Guide
+
+Thank you for taking the time to contribute! :tada::+1:
+
+The following is a set of guidelines for contributing to Redash. These are guidelines, not rules, please use your best judgement and feel free to propose changes to this document in a pull request.
+
+## Table of Contents
+
+[How can I Contribute?](#how-can-i-contribute)
+
+- [Reporting Bugs](#reporting-bugs)
+- [Suggesting Enhancements](#suggesting-enhancements)
+- [Pull Requests](#pull-requests)
+- Design?
+ 
+[Styleguides](#styleguides)
+
+[Code of Conduct](#code-of-conduct)
+
+## How can I contribute?
+
+### Reporting Bugs
+
+### Suggesting Enhancements
+
+- check roadmap and existing suggestions
+- describe what you want & your solution
+ 
+### Pull Requests
+
+...
+
+## Styleguides
+
+...
+
+## Code of Conduct
+
+This project adheres to the Contributor Covenant [code of conduct](http://redash.io/community/code_of_conduct). By participating, you are expected to uphold this code. Please report unacceptable behavior to team@redash.io.