Update README.md

Author: prabhanshuguptagit

Diff for: README.md

@@ -1,8 +1,14 @@
 # Bean blog
 
 ### Installation
+- Clone the repository.
+- In `bean-blog` run 
+```
+git submodule init
+git submodule update
+```
 - Install Go from https://go.dev/doc/install
 - Install Hugo from https://gohugo.io/installation
 - Run `hugo server`
 
-Uses the [Zen Theme](https://github.com/frjo/hugo-theme-zen/).
+This uses the [Zen Theme](https://github.com/frjo/hugo-theme-zen/).