[Docs] Update README.md for Alpine linux reference

Add 4 packages as Alpine Linux wiki suggested:
(grep util-linux binutils findutils)

https://wiki.alpinelinux.org/wiki/How_to_get_regular_stuff_working

README.md

@@ -486,7 +486,7 @@ There is a `-s` flag for `nvm install` which requests nvm download Node source a
 If installing nvm on Alpine Linux *is* still what you want or need to do, you should be able to achieve this by running the following from you Alpine Linux shell:
 
 ```sh
-apk add -U curl bash ca-certificates openssl ncurses coreutils python2 make gcc g++ libgcc linux-headers
+apk add -U curl bash ca-certificates openssl ncurses coreutils python2 make gcc g++ libgcc linux-headers grep util-linux binutils findutils
 curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.4/install.sh | bash
 ```