Node env wrapper for docker

node.sh

npmenv(){
    if [ $# -gt 0 ]; then
        ver=$1
    else
        ver='4.2.2'
    fi
    name=$(echo $ver|awk '{sub(/\./, "-"); print}')
    container="node:$ver"

    docker run --hostname node$name -it -v ${PWD}:/src -w /src \
        ${container} /bin/bash
}