Solution that probes endpoints and updates cachet if there is an outage or recovery

You will need Cachet up and running.
Take a look at Cachet's installation guide here
You will also need a URL (I.E http://cachet:8000/api/v1) of that Cachet server and authentication (I.E zlvNVV0VxKkuRL0WM5ww) token

You will need to provide a configuration file in yaml format. Supported configuration sample :

monitors:
  - endpoint:
    type: probe
    name: GoogleHello
    url: http://google-hello:8080
    method: GET
    frequency: 5
    expectedResponseCode: 200
    timeoutInSec: 10
    maxfailures: 5
    cachet:
      componentid: 1

You will need some endpoint to monitor:

docker run -it --rm --name google-hello -p 8080:8080 google/golang-hello

Check out start-monitor.sh to see how its started.