A way to pass in a custom background image

[sahanatvessel]

Is your feature request related to a problem? Please describe. I wish there was a way to create a splash screen with a custom background image

Describe the solution you'd like pass in either a URL or a string and depending on that the splash images are generated

[sahanatvessel]

I had a workaround for this with background: url(base64) but it's a bit of work to get the background image > base64 etc