Update README.md (by Terraform)

Author: m110

README.md

@@ -6,13 +6,16 @@
 
 This is Pub/Sub for the [Watermill](https://watermill.io/) project.
 
-All Pub/Sub implementations can be found at [https://watermill.io/pubsubs/](https://watermill.io/pubsubs/).
+
+See [DEVELOPMENT.md](./DEVELOPMENT.md) for more information about running and testing.
 
 Watermill is a Go library for working efficiently with message streams. It is intended
 for building event driven applications, enabling event sourcing, RPC over messages,
 sagas and basically whatever else comes to your mind. You can use conventional pub/sub
 implementations like Kafka or RabbitMQ, but also HTTP or MySQL binlog if that fits your use case.
 
+All Pub/Sub implementations can be found at [https://watermill.io/pubsubs/](https://watermill.io/pubsubs/).
+
 Documentation: https://watermill.io/
 
 Getting started guide: https://watermill.io/docs/getting-started/
@@ -29,7 +32,7 @@ and submit your pull request via GitHub.
 
 If you didn't find the answer to your question in [the documentation](https://watermill.io/), feel free to ask us directly!
 
-Please join us on the `#watermill` channel on the [Gophers slack](https://gophers.slack.com/): You can get an invite [here](https://gophersinvite.herokuapp.com/).
+Please join us on the `#watermill` channel on the [Three Dots Labs Discord](https://discord.gg/QV6VFg4YQE).
 
 ## License