Add docker config to edge

Fixes #5314

edge/engine/reference/commandline/config.md

@@ -0,0 +1,22 @@
+---
+datafolder: engine-cli-edge
+datafile: docker_config
+title: docker config
+---
+
+<!--
+Sorry, but the contents of this page are automatically generated from
+Docker's source code. If you want to suggest a change to the text that appears
+here, you'll need to find the string by searching this repo:
+
+https://www.github.com/docker/cli
+-->
+
+{% if page.datafolder contains '-edge' %}
+  {% include edge_only.md section="cliref" %}
+{% endif %}
+{% include cli.md datafolder=page.datafolder datafile=page.datafile %}
+
+## More info
+
+[Store configuration data using Docker Configs](/engine/swarm/configs.md)