BREAKING: Replace metrics

.examples/docker-compose-grafana-prometheus/README.md

@@ -0,0 +1,23 @@
+## Usage
+```console
+docker-compose up
+```
+Once you've done the above, you should be able to access the Grafana dashboard at `http://localhost:3000`.
+
+## Queries
+Gatus uses Prometheus counters.
+
+Total results per minute:
+```
+sum(rate(gatus_results_total[5m])*60) by (key)
+```
+
+Total successful results per minute:
+```
+sum(rate(gatus_results_total{success="true"}[5m])*60) by (key)
+```
+
+Total unsuccessful results per minute:
+```
+sum(rate(gatus_results_total{success="true"}[5m])*60) by (key)
+```