Add infrastructure to build and push docker containers (#64)

* add infrastructure to build and push docker containers

* make it part of the deploy workflow

.github/workflows/python-publish.yml

@@ -42,8 +42,18 @@ jobs:
         tags: true
     - name: Build and publish
       env:
-        TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+        TWINE_USERNAME: qmk
         TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
       run: |
         python setup.py sdist bdist_wheel
         twine upload dist/*
+    - name: Log in to Docker Hub
+      uses: docker/login-action@v1.10.0
+      with:
+        username: ${{ secrets.DOCKER_HUB_USERNAME }}
+        password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+    - name: Build and Push to Docker Hub
+      uses: docker/build-push-action@v2.5.0
+      with:
+        push: true
+        tags: qmkfm/qmk_cli:latest