Update docker example in migration guide
@@ -189,7 +189,7 @@ for more details.
If you're using Docker, then the following snippet would be used:
```
-docker run -u root -p 80:80 prom/prometheus:v2.0.0-rc.2 --web.listen-address :80
+docker run -p 9090:9090 prom/prometheus:latest
```
### Prometheus lifecycle
