Update dockerhub wf

.github/workflows/dockerhub.yml

@@ -1,4 +1,4 @@
-name: Publish Docker images
+name: Dockerhub
 
 on:
   push:
@@ -24,10 +24,12 @@ jobs:
         with:
           context: .
           push: true
+          tags: latest
 
       - name: Build and push Michelson Kernel image
         uses: docker/build-push-action@v2
         with:
           context: .
           file: Kernel.dockerfile
-          push: true
+          push: true
+          tags: latest

README.md

@@ -2,7 +2,7 @@
 
 [![PyPI version](https://badge.fury.io/py/pytezos.svg?)](https://badge.fury.io/py/pytezos)
 [![Tests](https://github.com/baking-bad/pytezos/workflows/Tests/badge.svg?)](https://github.com/baking-bad/pytezos/actions?query=workflow%3ATests)
-[![Docker Build Status](https://img.shields.io/docker/cloud/build/bakingbad/pytezos)](https://hub.docker.com/r/bakingbad/pytezos)
+[![Docker images](https://github.com/baking-bad/pytezos/workflows/Dockerhub/badge.svg?)](https://hub.docker.com/r/bakingbad/pytezos)
 [![Made With](https://img.shields.io/badge/made%20with-python-blue.svg?)](ttps://www.python.org)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/baking-bad/pytezos/master?filepath=michelson_quickstart.ipynb)