#530: Updated docker run command in README.md

Author: bpasson

README.md

@@ -24,7 +24,11 @@ Please remember to provide a good summary, description as well as steps to repro
 
 To run Louketo Proxy, please refer to our [building and working with the code base](docs/building.md) guide. Alternatively, you can use the Docker image by running:
 
-    docker run -it --rm quay.io/louketo/louketo-proxy
+    docker run -it --rm quay.io/louketo/louketo-proxy \
+      --listen 127.0.0.1:8080 \
+      --upstream-url http://127.0.0.1:80 \
+      --discovery-url https://keycloak.example.com/auth/realms/<REALM_NAME> \
+      --client-id <CLIENT_ID>
 
 For more details refer to the [Documentation](docs/user-guide.md).