Standalone Swagger UI guide for non-node users

Complicated install?

I know it will sound lame, but when I tested Swagger UI like two years ago I copied some static content, configured it a bit and was done. Today I'm lost in the installation documentation, not knowing where to start, Download button is never downloading but sending me to another page, etc.

When I tried dev environment from this page https://swagger.io/docs/open-source-tools/swagger-ui/development/setting-up/ I ended up on gyp error (I guess I have to install that Python 2.x).

When I get finally here https://www.npmjs.com/package/swagger-ui it suggests npm install ... (and one has to know the site to find it). But that command alone does not help.

When I try https://github.com/swagger-api/swagger-ui/blob/master/docs/usage/installation.md I'm lost right away.

I feel like I have to be node/npm master. I casually do Angular, but I have no idea how to get Swagger up and running in some standalone mode. There seems to be some hope on stackoverflow, but I remember easier start with Swagger UI before.

How can we help?

Step by step guide without assuming that I know node/npm would be welcome. If I create REST API I don't have to be well oriented in node ecosystem. I'm surprised that integration Swagger into Spring Boot is currently easier than to run it standalone with some specification as a parameter.