Bug report: Swagger UI not working

[weslambert]

Describe the bug
When viewing http://localhost:3000 or http://$host:3000, the page is blank, and errors are noticed in Chrome Dev tools. The underlying server seems to work fine and respond to requests -- it's just the Swagger docs that are unviewable.

To Reproduce
Follow documented instructions to run CyberChef-server from the README ( I actually had to perform an npm run prod vs npm run to start the project).

Expected behavior
Swagger documentation is displayed.

Node version:
10.18.1

Additional context
I'm not seeing any CSS files in the CyberChef-server folder. I'm not terribly familiar with Node, so please forgive my ignorance with regard to how things are built/managed.

[d98762625]

Confirmed that I can replicate this behaviour

[d98762625]

@weslambert note that npm run won't work, but npm run start would. npm run needs a script name to run.

(but the bug still remains)