Add a default latest tag for amd64

gitlabci/docker-hub.yml

@@ -60,6 +60,8 @@ push-docker-hub:
     - docker push $HUB_REGISTRY_IMAGE:$SQUID_VERSION-amd64
     - docker tag $CONTAINER_BUILD_NOPROD_NAME_AMD64 $HUB_REGISTRY_IMAGE:latest-amd64
     - docker push $HUB_REGISTRY_IMAGE:latest-amd64
+    - docker tag $CONTAINER_BUILD_NOPROD_NAME_AMD64 $HUB_REGISTRY_IMAGE:latest
+    - docker push $HUB_REGISTRY_IMAGE:latest
   variables:
     GIT_STRATEGY: none
   needs: ["docker-hub-test"]