doc: Create secret for wordpress package (#2380)

Author: frankfarzan

site/book/06-deploying-packages/02-applying-a-package.md

@@ -1,7 +1,19 @@
-Once you have initialized the package, you can deploy it using `live apply`:
+Once you have initialized the package, you can deploy it using `live apply`.
+
+The `wordpress` package requires a `Secret` containing the mysql password.
+Let's create that first:
+
+```shell
+$ kubectl create secret generic mysql-pass --from-literal=password=YOUR_PASSWORD
+```
+
+!> You can also declare the `Secret` resource, but make sure it is not commited to
+Git as part of the package.
+
+Then deploy the package and wait for the resources to be reconciled:
 
 ```shell
-$ kpt live apply wordpress
+$ kpt live apply wordpress --reconcile-timeout=2m
 installing inventory ResourceGroup CRD.
 service/wordpress created
 service/wordpress-mysql created
@@ -13,13 +25,6 @@ persistentvolumeclaim/wp-pv-claim created
 0 resource(s) pruned, 0 skipped, 0 failed
 ```
 
-Alternatively, you can specify whether you want to wait for resources to be
-reconciled:
-
-```shell
-$ kpt live apply wordpress --reconcile-timeout=2m
-```
-
 ?> Refer to the [apply command reference][apply-doc] for usage.
 
 ## `ResourceGroup` CRD