Background colour

[modem7]

Heya,

Thanks for this project! I've been using it on and off for a few years to show how Docker infrastructure can work to others!

By adding [bgcolor=colour]; to the graph syntax, it's possible to make the diagrams a little less retina scarring white.

e.g.

// Docker Network Graph
graph {
	graph [splines=true] [bgcolor=black];

Is a custom background colour something that can be readily implemented at all?

[webysther]

I started a migration of a mess bridge all-in-one to proxy-like and got some black rectangles, you know how fix this?

[webysther]

I got a fix, replace #%06x by #ffff99

[MuratovAS]

I fixed the problem with black squares. Added some features. https://github.com/MuratovAS/docker-network-graph

[webysther]

Great job @MuratovAS