Merge pull request #674 from wbaldoumas/contriuting-docs

Add Contributing Docs

contributing.md

@@ -0,0 +1,36 @@
+# How to Contribute
+
+Thanks for your interest in contributing to `Markdig`! Here are a few general guidelines on contributing and
+reporting bugs that we ask you to review. Following these guidelines helps to communicate that you respect the time of
+the contributors managing and developing this open source project.
+
+## Reporting Issues
+
+Before reporting a new issue, please ensure that the issue was not already reported or fixed by searching through our
+[issues list](https://github.com/xoofx/markdig/issues).
+
+When creating a new issue, please be sure to include a **title and clear description**, as much relevant information as
+possible, and, if possible, a test case.
+
+## Sending Pull Requests
+
+Before sending a new pull request, take a look at existing pull requests and issues to see if the proposed change or fix
+has been discussed in the past, or if the change was already implemented but not yet released.
+
+We expect new pull requests to include tests for any affected behavior, and, as we follow semantic versioning, we may
+reserve breaking changes until the next major version release.
+
+## Other Ways to Contribute
+
+We welcome anyone that wants to contribute to `Markdig` to triage and reply to open issues to help troubleshoot
+and fix existing bugs. Here is what you can do:
+
+- Help ensure that existing issues follows the recommendations from the _[Reporting Issues](#reporting-issues)_ section,
+  providing feedback to the issue's author on what might be missing.
+  instructions and code samples.
+- Review existing pull requests, and testing patches against real existing applications that use `Markdig`.
+- Write a test, or add a missing test case to an existing test.
+
+Thanks again for your interest on contributing to `Markdig`!
+
+:heart:

readme.md

@@ -101,6 +101,10 @@ var result = Markdown.ToHtml("This is a text with some *emphasis*", pipeline);
 
 You can have a look at the [MarkdownExtensions](https://github.com/lunet-io/markdig/blob/master/src/Markdig/MarkdownExtensions.cs) that describes all actionable extensions (by modifying the MarkdownPipeline)
 
+## Contributing
+
+Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated. For detailed contributing guidelines, please see [contributing.md](contributing.md).
+
 ## Build
 
 In order to build Markdig, you need to install [.NET 6.0](https://dotnet.microsoft.com/en-us/download)