### Send POST request with json body
POST https://synapse.hyteck.de/_matrix/maubot/plugin/alertbot/webhook/!zOcbWjsWzdREnihgeC:hyteck.de
Content-Type: application/json

{
  "receiver": "Alertbot",
  "status": "firing",
  "alerts": [
    {
      "status": "firing",
      "labels": {
        "alertname": "HTTP response not OK",
        "grafana_folder": "General Alerting"
      },
      "annotations": {},
      "startsAt": "2022-08-24T18:45:00+02:00",
      "endsAt": "0001-01-01T00:00:00Z",
      "generatorURL": "http://0.0.0.0:3000/alerting/grafana/t7R1ZdZ4k/view",
      "fingerprint": "54827aa3e6b3dbbe",
      "silenceURL": "http://0.0.0.0:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DHTTP+response+not+OK&matcher=grafana_folder%3DGeneral+Alerting",
      "dashboardURL": "",
      "panelURL": "",
      "valueString": "[ var='B0' metric='Value' labels={server=http://s1.example.com} value=503 ]"
    }
  ],
  "groupLabels": {},
  "commonLabels": {
    "alertname": "HTTP response not OK",
    "grafana_folder": "General Alerting"
  },
  "commonAnnotations": {},
  "externalURL": "http://0.0.0.0:3000/",
  "version": "1",
  "groupKey": "{}:{}",
  "truncatedAlerts": 0,
  "orgId": 1,
  "title": "[FIRING:1]  (HTTP response not OK General Alerting)",
  "state": "alerting",
  "message": "**Firing**\n\nValue: [ var='B0' metric='Value' labels={server=http://s1.example.com} value=503 ]\nLabels:\n - alertname = HTTP response not OK\n - grafana_folder = General Alerting\nAnnotations:\nSource: http://0.0.0.0:3000/alerting/grafana/t7R1ZdZ4k/view\nSilence: http://0.0.0.0:3000/alerting/silence/new?alertmanager=grafana&matcher=alertname%3DHTTP+response+not+OK&matcher=grafana_folder%3DGeneral+Alerting\n"
}