basic application monitor

apparently monitoring is important.

As a developer I like to reinvent the wheel so here's the basic application monitor.

A windows service runs a heap of monitors based on 3 types; website monitor checks for a good http response code, db monitor runs a small select query, healthchecker requests some json from the app (this is a custom thing we do on the apps so the app can report how healthy it is). The service then outputs it all into a big json file on the filesystem. The website then reads the json and displays it.

There's no notifications, there's no history, there's no interface to add more monitors (you have to add via json configuration). The goal is to keep it as simple as possible and be a snapshot of what is happening right now.