Fixing issues in command ordering. Adding index.md

Adjust bullets
Entering Seb's comments

Signed-off-by: Mary Anthony <mary@docker.com>
Upstream-commit: b44ef2b306c56dad16500c3738b0f29ec0f34635
Component: engine

components/engine/docs/reference/commandline/export.md

@@ -5,7 +5,6 @@ description = "The export command description and usage"
 keywords = ["export, file, system, container"]
 [menu.main]
 parent = "smn_cli"
-weight=1
 +++
 <![end-metadata]-->