Cannot build regexr on a Debian system

Hello,

I have been trying to install regexr on a local webserver, but as someone who only touched a bit node.js some years ago, I am somewhat lost. I do not really understand what I am supposed to do to make a release work, apart that I am supposed to run npm install at some point and use gulp to build the package.

Could someone edit the readme file to add more detailed packaging/installation instructions? (and also specifying all the dependencies required)

Thank you!