npm change package installation location

When users don’t have admin access to install packages in root directory they can change package location to user’s writable location.

find the fix below

1. Make directory `mkdir ~/.npm-global`
2. Set configuration folder location
   `npm config set prefix ~/.npm-global`
3. Add path to user environment path
   `export PATH=~/.npm-global/bin:$PATH`

That is it.Now onwards when you install any package globally it will be placed in npm-global folder.