Update README.md

#24

Author: Apollo-Roboto

README.md

@@ -41,6 +41,8 @@ Available to import from [Grafana dashboards](https://grafana.com/grafana/dashbo
 
 # How to use
 
+This extension won't do much by itself, you must have an instance of [Prometheus](https://prometheus.io/) configured to collect those metrics and an instance of [Grafana](https://grafana.com/grafana/) to visualize it.
+
 Once the cog is added to your bot, the Prometheus metric endpoint can be accessed
 at `localhost:8000/metrics`.
 
@@ -101,3 +103,14 @@ The default port is `8000` but can be changed while creating the cog.
 ```python
 await bot.add_cog(PrometheusCog(bot, port=7000))
 ```
+
+## Configuring Prometheus
+
+Here is a quick example scrape config that you would write in `prometheus.yml`. *(make sure to replace name and host accordinly)*
+
+```yaml
+scrape_configs:
+  - job_name: "discordBot{{ name }}"
+    static_configs:
+      - targets: ["{{ host }}:8000"]
+```