Add contributing file

CONTRIBUTING.md

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+** Please review the appropriate guideline page before submitting an Issue or a
+Pull Request. **
+
+### Issues
+
+Issues include:
+
+ - Bug reports
+ - Feature requests
+ - Help
+ - Build errors
+
+[Reporting Guidelines](https://github.com/szechyjs/dsd/wiki/Bug-reports)
+
+### Code Contributions
+
+[Contributing Guidelines](https://github.com/szechyjs/dsd/wiki/Contributing)