docker-images: Adding command to sort images by size (#10231)

* docker-images: Adding command to sort images by size

From: https://stackoverflow.com/a/61091528/520275

* docker-images: Adding colon to git images sort command

pages/common/docker-images.md

@@ -22,3 +22,7 @@
 - List images that contain a substring in their name:
 
 `docker images "{{*name*}}"`
+
+- Sort images by size:
+
+`docker images --format "{{.ID}}\t{{.Size}}\t{{.Repository}}:{{.Tag}}" | sort -k 2 -h`