Ensure kubernetes nodes repull a docker image that was silently updated

If you silently overwrite a docker image in your registry with a new version, the image might not get automatically updated if you specified that version in your kubernetes configuration. In that case, add the following imagePullPolicy to ensure the image is always refetched, even if it is the same version number.

More details on the working of the image pull policy can be found in this stack overflow thread

imagePullPolicy: Always