Monitorr VS Intranet-Home-Page

If you can self-host it, then you can look at either Monitorr or Uptime-Kuma. Both have webpages you can configure, and at least Uptime-Kuma has notification capability with a number of options for how you receive those notifications. From what I remember neither will inform you of available updates, I use Diun or Watchtower for that.

You may find that Monitorr is what you are looking for. It basically will do a ping to see if stuff is online, it is web based. There are Unraid templates so you could run it on the primary Unraid server and check the web page from Win10.

Have you seen https://github.com/jmarmorato/Intranet-Home-Page? This is separate from the downloading radar imagery every 15, but this is another thing I host that the whole family uses.

There are screenshots here: https://github.com/jmarmorato/Intranet-Home-Page

I wrote a custom homepage (https://github.com/jmarmorato/Intranet-Home-Page) that the family and I use. We have links to everything internal and external that we use regularly, and some other information like calendars, weather, and news. As far as DNS goes, I used a .net so I don't have the browser issues you do (your browser isn't recognizing a .home as a TLD, so it's just trying to search it instead of navigate to it. If you try http(s)://selfhosted.home, that should work as you are basically forcing the browser to not search (unless there's a URL syntax issue.

Unfortunately I don't think there really is a good option? Someone on this subreddit was making one and even released it, but since it only has 2 commits I wouldn't rely on it being maintained, and the install instructions might be a bit much from your post https://github.com/jmarmorato/Intranet-Home-Page . Still, it might be worth looking into since I think it comes the closest to what you want.