NodeJS ships with the awesome node package manager: NPM. NPM allows to install dependencies defined for your project via package.json. When running a node app in production you want it to install as quick as possible. Pushing new code into the app repository will probably start the continuous integration …

This error is strange, because it appears when you're trying to install a new package globally with NPM, npm install -g <package-name>. The output of this command is something like this: npm ERR! peerinvalid The package grunt does not satisfy its siblings' peerDependencies requirements! npm ERR! peerinvalid Peer …