Make sure you have node and npm installed on your machine. (You can check by running "npm -v" from the command line, if you don't see anything, then take a quick google search on how to install it).

Run "npm install" in the folder directory where the package.json is visible. In this case, if you cloned or extracted this project, it would be in the slack-poker-bot folder.

Hope that helps!

NPM is the Node Package Manager. So, you must have node installed to get npm.

https://nodejs.org/download/