Push notifications for specific user / group of users about server

[jmattheis]

Hey, solving this problem in gotify is pretty difficult because the data model doesn't support it. Currently applications are bound to a specific user. This makes it difficult to support sending messages to a specific user, because you'd need an application token from that specific user.

It would probably be possible to adjust gotify-broadcast to allow sending messages to a specific user.

[OdinVex]

Perhaps this could be done for a Major SemVer then? I'd rather see Broadcast integrated and extended so well. Plus SVG icons, they can be much smaller than PNG, JPEG, GIF and scale to size. Having trouble with multiple devices getting blurry or too clear (oversized) icons.