Added CONTRIBUTING.md

Author: maanas-talwar

CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contributing
+
+When contributing to this repository, please first discuss the change you wish to make via issue,
+[gitter](https://gitter.im/scorelab/Scan8), or any other method with the owners of this repository before making a change. 
+
+Please note we have a [code of conduct](/CODE_OF_CONDUCT.md), please follow it in all your interactions with the project.
+
+## Pull Request Process
+
+1. Ensure any install or build dependencies are removed before the end of the layer when doing a 
+   build.
+2. Update the README.md with details of changes to the interface, this includes new environment 
+   variables, exposed ports, useful file locations and container parameters.
+3. Increase the version numbers in any examples files and the README.md to the new version that this
+   Pull Request would represent. The versioning scheme we use is [SemVer](http://semver.org/).
+4. **Please make sure that you create new pull request to the develop branch, instead of main branch**