草稿：NPM基本操作 设置仓库

查看NPM当前配置:

npm config list

使用config命令指定源仓库

npm config set registry https://registry.npm.taobao.org

通过下载指定源仓库：

npm --registry https://registry.npm.taobao.org install

编辑 ~/.npmrc

grep 'registry'  ~/.npmrc &>/dev/null && \
echo "registry already exists" || \
cat << EOF >>~/.npmrc 
registry = https://registry.npm.taobao.org 
EOF