adding a warning in deploy-image plugin doc

Author: NikhilSharmaWe

docs/book/src/plugins/deploy-image-plugin-v1-alpha.md

@@ -4,6 +4,7 @@ The deploy-image plugin allows users to create [controllers][controller-runtime]
 the guidelines and best practices. It abstracts the complexities to achieve this goal while allowing users to improve and customize their projects.
 
 By using this plugin you will have:
+
 - a controller implementation to Deploy and manage an Operand(image) on the cluster
 - tests to check the reconciliation implemented using [ENVTEST][envtest]
 - the custom resources samples updated with the specs used
@@ -32,6 +33,19 @@ Then, by using this plugin you can [create APIs](https://book.kubebuilder.io/cro
 kubebuilder create api --group example.com --version v1alpha1 --kind Memcached --image=memcached:1.6.15-alpine --image-container-command="memcached,-m=64,modern,-v" --image-container-port="11211" --run-as-user="1001" --plugins="deploy-image/v1-alpha"
 ```
 
+<aside class="warning">
+<h1>Using make run</h1>
+
+The `make run` will execute the `main.go` outside of the cluster to let you test the project running it locally. Note that by using this plugin the Operand image informed will be stored via an environment variable in the `config/manager/manager.yaml` manifest.
+
+Therefore, before run `make run` you need to export any environment variable that you might have. Example:
+
+```sh
+export MEMCACHED_IMAGE="memcached:1.4.36-alpine"
+```
+
+</aside>
+
 ## Subcommands
 
 The deploy-image plugin implements the following subcommands:
@@ -48,8 +62,8 @@ With the `create api` command of this plugin, in addition to the existing scaffo
 - `api/<version>/*_types.go` (scaffold the specs for the new api)
 - `config/samples/*_.yaml` (scaffold default values for its CR)
 - `main.go` (update to add controller setup)
-- `config/manager.yaml` (update with envvar to store the image)
+- `config/manager/manager.yaml` (update with envvar to store the image)
 
 [controller-runtime]: https://github.com/kubernetes-sigs/controller-runtime
 [testdata]: https://github.com/kubernetes-sigs/kubebuilder/tree/master/testdata/
-[envtest]: ../reference/envtest.md
+[envtest]: ../reference/envtest.md