Including undeploy feature on Makefile (#480)

* Including undeploy feature on Makefile

* Update CONTRIBUTING.md

Co-authored-by: Juraci Paixão Kröhling <[email protected]>

Co-authored-by: Juraci Paixão Kröhling <[email protected]>

Author: yuriolisa

CONTRIBUTING.md

@@ -87,6 +87,12 @@ Once they are installed, the tests can be executed with `make prepare-e2e`, whic
 
 The tests are located under `tests/e2e` and are written to be used with `kuttl`. Refer to their documentation to understand how tests are written.
 
+### Undeploying the operator from the local cluster
+
+```bash
+make undeploy
+```
+
 ## Project Structure
 
 For a general overview of the directories from this operator and what to expect in each one of them, please check out the [official GoDoc](https://godoc.org/github.com/open-telemetry/opentelemetry-operator) or the [locally-hosted GoDoc](http://localhost:6060/pkg/github.com/open-telemetry/opentelemetry-operator/)

Makefile

@@ -80,10 +80,14 @@ uninstall: manifests kustomize
 set-image-controller: manifests kustomize
 	cd config/manager && $(KUSTOMIZE) edit set image controller=${IMG}
 
-# Deploy controller in the configured Kubernetes cluster in ~/.kube/config
+# Deploy controller in the current Kubernetes context, configured in ~/.kube/config
 deploy: set-image-controller
 	$(KUSTOMIZE) build config/default | kubectl apply -f -
 
+# Undeploy controller in the current Kubernetes context, configured in ~/.kube/config
+undeploy: set-image-controller
+	$(KUSTOMIZE) build config/default | kubectl delete -f -
+
 # Generates the released manifests
 release-artifacts: set-image-controller
 	mkdir -p dist