[Docs] Install script - Improve installation guide
[Docs] Install script - Improve installation guide

If installation is prompted to be successful, yet `which nvm` command returns `not found` then you might need to restart your terminal instance. Try opening a new tab/window in your terminal and retry.
edwmurph/nvm,PeterDaveHello/nvm,PeterDaveHelloKitchen/nvm,creationix/nvm,ljharb/nvm,edwmurph/nvm,creationix/nvm,evocateur/nvm,PeterDaveHello/nvm,PeterDaveHelloKitchen/nvm,ljharb/nvm,evocateur/nvm