doc: provide installation instructions

README.md

@@ -5,12 +5,26 @@
 [![lint](https://github.com/kudobuilder/kuttl/actions/workflows/lint.yml/badge.svg?branch=main)](https://github.com/kudobuilder/kuttl/actions)
 [![unit test](https://github.com/kudobuilder/kuttl/actions/workflows/unittest.yml/badge.svg?branch=main)](https://github.com/kudobuilder/kuttl/actions)
 [![integration-test](https://github.com/kudobuilder/kuttl/actions/workflows/integration-test.yml/badge.svg?branch=main)](https://github.com/kudobuilder/kuttl/actions)
-[![Go Report Card](https://goreportcard.com/badge/github.com/kudobuilder/kuttl)](https://goreportcard.com/report/github.com/kudobuilder/kuttl)  
+[![Go Report Card](https://goreportcard.com/badge/github.com/kudobuilder/kuttl)](https://goreportcard.com/report/github.com/kudobuilder/kuttl)
 
 KUbernetes Test TooL (KUTTL) provides a declarative approach to test Kubernetes Operators.
 
 KUTTL is designed for testing operators, however it can declaratively test any kubernetes objects.
 
+## Installation
+
+To install our custom fork of KUTTL, you can either pull the pre-compiled from Nexus:
+```
+curl -Lo kuttl "https://repo.stackable.tech/repository/packages/kuttl/stable-{$(arch)}"
+sudo mv kuttl /usr/local/bin
+sudo chmod +x /usr/local/bin/kuttl
+```
+
+Or install it from source:
+```
+go install github.com/stackabletech/kuttl/cmd/kubectl-kuttl@latest
+```
+
 ## Getting Started
 
 Please refer to the [getting started guide](docs/README.md) documentation.