I went to have a snoop around the code but all I can really see is installation files. Genuine question, is this project closed source? I haven't really worked

I went to have a snoop around the code but all I can really see is installation files. Genuine question, is this project closed source? I haven't really worked with Docker in anger yet - but I guess I could pull down the files / run it and then take a look inside to see how it works. Is there a link to the original code? Is there a risk that projects are going to start to be released in a way where it's going to take jumping through a couple of hoops to see how they work? I don't want to sound disparaging to the project (it sounds interesting). I was just curious in having a really quick glance at the code to see if it was something I wanted to keep an eye on.