Update to base image.

Dockerfile

 # hadolint ignore=DL3006
 FROM registry.shore.co.il/cron as supersonic
 
-FROM registry.hub.docker.com/library/python:3.6-alpine3.13
+FROM registry.hub.docker.com/library/python:3.6-alpine3.14
 COPY --from=supersonic /usr/local/bin/supersonic /usr/local/bin/
 # hadolint ignore=DL3018
 RUN apk add --update --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/edge/testing/ \