Flag Addition: --type flag added for docker inspect command

Signed-off-by: Shishir Mahajan <shishir.mahajan@redhat.com>

docs/reference/commandline/inspect.md

@@ -17,6 +17,9 @@ weight=1
 
       -f, --format=""    Format the output using the given go template
 
+     --type=container|image  Return JSON for specified type, permissible 
+                             values are "image" or "container"
+
 By default, this will render all results in a JSON array. If a format is
 specified, the given template will be executed for each result.