Fix small typo in Docker documentation

site/content/installation-upgrade/container-environments/docker-images.md

@@ -170,7 +170,7 @@ docker run --name nginx-agent -d nginx-agent
 To connect your NGINX Agent container to your NGINX One or NGINX Instance Manager instance, you must enable the gRPC interface. To do this, you must edit the NGINX Agent configuration file, *nginx-agent.conf*. For example:
 
 ```yaml
-erver:
+server:
   host: 127.0.0.1 # mock control plane host
   grpcPort: 54789 # mock control plane gRPC port