Adding svg file as a page background?

Can anybody help me out adding svg file as a whole page background?

I know it is possible, this site is built with Wix and is having the same thing I want: https://www.designmattersmedia.com/designmatters

OK, I figured it out: connect page to a dataset.

How does connecting a dataset allow you to set an svg as background?

although an old question, i’ll answer for convenience of latecomers like me: you can copy-paste an svg’s url to a dataset image field, then link the page background to that field.