[Node.js] How do you reinstall an app's dependencies using npm?
Right way is to execute
npm update. It's a really powerful command, it updates the missing packages and also checks if a newer version of package alreaddy installed can be used.
Read Intro to NPM to understand what you can do with npm.
Is there a simple way to reinstall all packages that my app depends on (i.e. they are in my apps node_modules folder)?