chore(docs): Add badges to README.

Author: playpauseandstop

README.md

@@ -1,5 +1,13 @@
 # docker-python
 
+.. image:: https://img.shields.io/docker/cloud/build/playpauseandstop/docker-python.svg
+    :target: https://hub.docker.com/r/playpauseandstop/docker-python
+    :alt: Docker Cloud Build Status
+
+.. image:: https://img.shields.io/docker/pulls/playpauseandstop/docker-python.svg
+    :target: https://hub.docker.com/r/playpauseandstop/docker-python
+    :alt: Docker Pulls
+
 Add poetry, pre-commit, and other dev-tools to official Python slim stretch
 Docker image.