docs: installation from official krew index

Signed-off-by: flavono123 <[email protected]>

README.md

@@ -2,8 +2,13 @@
 
 ![demo](./assets/kupid.gif)
 
+
 Pick any Deep schema fields, create your own table view of Kubernetes TUI.
 
+![GitHub License](https://img.shields.io/github/license/flavono123/kupid)
+![GitHub go.mod Go version](https://img.shields.io/github/go-mod/go-version/flavono123/kupid)
+[![Go Report Card](https://goreportcard.com/badge/github.com/flavono123/kupid)](https://goreportcard.com/report/github.com/flavono123/kupid)
+
 ## Installation
 
 ### Homebrew
@@ -17,10 +22,14 @@ kupid
 ### Krew
 
 ```sh
+# from the official krew index
+kubectl krew install pickdeep  # more general name for this case; https://krew.sigs.k8s.io/docs/developer-guide/develop/naming-guide/
+
+# from my custom krew index, more latest since follow this repo's package
 kubectl krew index add flew https://github.com/flavono123/flew-index.git
 kubectl krew install flew/pickdeep
 
-kubectl pickdeep # more general name for this case; https://krew.sigs.k8s.io/docs/developer-guide/develop/naming-guide/
+kubectl pickdeep
 ```
 
 ### Go