chore(docker-ee): Add documentation for camunda-bpm-platform-ee

Related to CAM-8448

content/installation/docker.md

@@ -15,3 +15,31 @@ menu:
 # Community Edition
 
 The Community Edition docker images can be found on [Github](https://github.com/camunda/docker-camunda-bpm-platform) and [Docker Hub](https://hub.docker.com/r/camunda/camunda-bpm-platform/).
+
+# Enterprise Edition
+
+Since version 7.9 we offer to our customers a Docker image for the Enterprise edition of Camunda BPM platform.
+
+These images are hosted on our dedicated Docker registry and are available to Enterprise customers only. You can browse the available images in our [Docker registry](https://repository.camunda.cloud/#browse/search/docker) after logging-in with your credentials.
+
+Please note that these images are build using the same Dockerfile of the Community image, but including the Enterprise version of the platform. For this reason, the same [documentation](https://github.com/camunda/docker-camunda-bpm-platform/tree/master#environment-variables) applies.
+
+Make sure to log-in correctly before trying to pull the image:
+
+```
+$ docker login registry.camunda.cloud
+Username: my.username
+Password:
+Login Succeeded
+
+$ docker pull registry.camunda.cloud/camunda-bpm-platform-ee:7.9.0-alpha5
+7.9.0-alpha5: Pulling from camunda-bpm-platform-ee
+ff3a5c916c92: Already exists
+5de5f69f42d7: Already exists
+fa7536dd895a: Pull complete
+46ce7a9973c1: Pull complete
+6fa1782e4a59: Pull complete
+fbf8f17dff48: Pull complete
+Digest: sha256:47598932a4aff210ce91819d3b75adbfde675017b13ce9881c9d7dca682fba96
+Status: Downloaded newer image for registry.camunda.cloud/camunda-bpm-platform-ee:7.9.0-alpha5
+```