Update local development command (#5687)

* Updated readme.md file with cd command to move into that folder before running further npm command. Also removed roadmap from go

* Addressed review comment - Reverted changes in index.astro file

readme.md

@@ -109,6 +109,7 @@ Clone the repository, install the dependencies and start the application
 
 ```bash
 git clone git@github.com:kamranahmedse/developer-roadmap.git
+cd developer-roadmap
 npm install
 npm run dev
 ```