Chore(guide): added information about Docker login command (#26851)

* chore: information about Docker login command

Added information on how to use docker login command for logging into private Docker registry.

* chore: fixed the typo

fixed the typo in the docker login command

* Fix wording

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

@@ -0,0 +1,18 @@
+---
+title: Docker Login
+---
+
+## Docker Login
+
+`docker Login` allow us to login into private Docker registry.
+
+The command can be used like this:
+
+```shell
+docker login -u <username> <private registry url>  
+```
+
+After this it will ask for the password for the `<username>` user.
+
+#### More Information:
+- [Docker CLI docs: login](https://docs.docker.com/engine/reference/commandline/login/)