work out a way to send site paths to javascript

Not 100% ideal but at least it can give one place to set and change these things.

Possibly, if live and dev have to be different, I could get these into an alway loaded element, get unique versions in each place, then gitignore them.
Image setting tool is in place for diagrams

There are still images to shoot to make the system fully operational.

One more issue: layer component.

And an issue for the page: Price calculations
Make sure diagram style sheets don't duplicate on every click