docker kill --signal option with example (#22166)

* docker kill --signal option with example

* Fixed typos

guide/english/docker/docker-kill/index.md

@@ -24,5 +24,12 @@ To kill more than one container, container names or IDs must be added with a whi
 docker kill mycontainer mysecondcontainer mythirdcontainer
 ```
 
+You can specify which signal is emitted to the container using the `--signal` (or `-s`) option. For example, you can reload your `nginx` container configuration using:
+
+```
+docker kill -s HUP container_name
+```
+
+
 #### More Information:
 - [Docker CLI docs: kill](https://docs.docker.com/engine/reference/commandline/kill/)