DOC: add links to discord (#535)

* add links to discord

* use flat style

* include logo

* logo colour

Author: martinfleis

README.md

@@ -1,6 +1,6 @@
 # momepy
 [![Documentation Status](https://readthedocs.org/projects/momepy/badge/?version=latest)](http://docs.momepy.org/en/latest/?badge=latest) [![Actions Status](https://github.com/pysal/momepy/workflows/Tests/badge.svg)](https://github.com/pysal/momepy/actions?query=workflow%3ATests)
-[![codecov](https://codecov.io/gh/pysal/momepy/branch/main/graph/badge.svg?token=VNn0WR5JWT)](https://codecov.io/gh/pysal/momepy) [![CodeFactor](https://www.codefactor.io/repository/github/pysal/momepy/badge)](https://www.codefactor.io/repository/github/pysal/momepy) [![DOI](https://joss.theoj.org/papers/10.21105/joss.01807/status.svg)](https://doi.org/10.21105/joss.01807)
+[![codecov](https://codecov.io/gh/pysal/momepy/branch/main/graph/badge.svg?token=VNn0WR5JWT)](https://codecov.io/gh/pysal/momepy) [![Discord](https://img.shields.io/badge/Discord-join%20chat-7289da?style=flat&logo=discord&logoColor=cccccc&link=https://discord.gg/he6Y8D2ap3)](https://discord.gg/he6Y8D2ap3) [![DOI](https://joss.theoj.org/papers/10.21105/joss.01807/status.svg)](https://doi.org/10.21105/joss.01807)
 
 
 <img src="https://raw.githubusercontent.com/pysal/momepy/main/docs/_static/logo.png" width="50%">

docs/index.rst

@@ -144,7 +144,7 @@ Details are available in the :doc:`contributing guide <contributing>`.
 Get in touch
 ------------
 If you have a question regarding momepy, feel free to open an
-`issue`_ or a new `discussion`_ on GitHub.
+`issue`_, a new `discussion`_ on GitHub or join a chat on `Discord`_.
 
 Acknowledgements
 ----------------
@@ -187,4 +187,5 @@ Indices and tables
 .. _@martinfleis: http://github.org/martinfleis
 .. _@jGaboardi: http://github.org/jGaboardi
 .. _issue: https://github.com/pysal/momepy/issues/new/choose
-.. _discussion: https://github.com/pysal/momepy/discussions
+.. _discussion: https://github.com/pysal/momepy/discussions
+.. _Discord: https://discord.gg/he6Y8D2ap3