运行：

npm install

从您的应用程序目录（即package.json所在的位置）将安装应用程序的依赖关系，而不是将其作为模块安装如这里所述。这些将放在./node_modules相对于你的package.json文件（实际上比这更复杂一些，所以检查 npm文档在这里）。

from inside your app directory (i.e. where package.json is located) will install the dependencies for your app, rather than install it as a module, as described here. These will be placed in ./node_modules relative to your package.json file (it's actually slightly more complex than this, so check the npm docs here).

如果需要，可以将node_modules目录移动到应用程序的父目录，因为节点的需要机制明白这一点但是，如果要使用install / update更新应用程序的依赖项，npm将不会再看到重定位的node_modules，而是相对于package.json再次创建一个新的目录。

You are free to move the node_modules dir to the parent dir of your app if you want, because node's 'require' mechanism understands this. However, if you want to update your app's dependencies with install/update, npm will not see the relocated 'node_modules' and will instead create a new dir, again relative to package.json.

为了防止这种情况，只需从应用程序目录创建一个重新定位的node_modules的符号链接：

To prevent this, just create a symlink to the relocated node_modules from your app dir:

ln -s ../node_modules node_modules