Updated docker_image_facts module proposal.

docs/proposals/docker/docker_image_facts_module.md

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+
+# Docker_Image_Facts Module Proposal
+
+## Purpose and Scope
+
+The purpose of docker_image_facts is to inspect docker images.
+
+Docker_image_facts will use docker-py to communicate with either a local or remote API. It will
+support API versions >= 1.14. API connection details will be handled externally in a shared utility module similar
+to how other cloud modules operate.
+
+## Parameters
+
+Docker_image_facts will support the parameters listed below. API connection parameters will be part of a shared
+utility module as mentioned above.
+
+```
+name:
+  description:
+    - An image name or list of image names. The image name can include a tag using the format C(name:tag).
+  default: null
+```
+
+## Examples
+
+```
+- name: Inspect all images
+  docker_image_facts
+  register: image_facts
+  
+- name: Inspect a single image
+  docker_image_facts:
+    name: myimage:v1
+  register: myimage_v1_facts
+```
+
+## Returns
+
+```
+{
+   changed: False
+   failed: False
+   rc: 0
+   result: [ < inspection output > ]
+}
+```
+