Adds discord server invite link (#157)

Author: spacether

README.md

@@ -17,6 +17,10 @@ Currently, the following languages/frameworks are supported:
 
 - python
 
+## Join Our Community
+We use a Discord server as a place to ask questions and help each other. It offers functionality very similar to Slack.
+You can join us here: https://discord.gg/mHB8WEQuYQ
+
 ## Reasons To Use the Python Generator
 
 - [Autogenerated thorough testing of json schema keyword features in models and endpoints](https://github.com/openapi-json-schema-tools/openapi-json-schema-generator/tree/master/samples/openapi3/client/3_0_3_unit_test/python/test) which come from the [json schema test suite](https://github.com/json-schema-org/JSON-Schema-Test-Suite)