🔧 Add krew plugin manager for kubectl in README. (#200)

apps/README.md

@@ -0,0 +1,44 @@
+# Apps
+
+Install `krew` plugin manager for `kubectl`
+
+```bash
+brew install krew
+```
+
+Update `.zshrc` file
+
+```bash
+export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"
+```
+
+Install CloudNativePG plugin to manager postgres clusters
+
+```bash
+kubectl krew install cnpg
+```
+
+Shell into ecran postgres cluster
+
+```bash
+kubectl cnpg psql ecran-cluster -n ecran
+```
+
+## Additional Details
+
+### Krew Plugin Manage
+
+`krew` is a plugin manager for `kubectl`, the Kubernetes command-line tool. It allows you to easily discover, install, and manage kubectl plugins.
+
+### CloudNativePG Plugin
+
+The CloudNativePG plugin (`cnpg`) is used to manage PostgreSQL clusters in Kubernetes environments. It provides a set of custom resources and controllers to automate the deployment and management of PostgreSQL clusters.
+
+### Accessing the Ecran PostgreSQL Cluster
+
+The `kubectl cnpg psql` command provides direct access to the PostgreSQL shell of the specified cluster. This is useful for running queries, managing databases, or troubleshooting issues directly on the cluster.
+
+### Environment Variables
+
+Remember to source your `.zshrc` file or restart your terminal session after updating it with the new PATH:
+