Add a script to tag the current image as the release version.

Author: jum

tag_release.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+DOCKER_PREFIX=jumager/caddy
+branch=$(basename $(git rev-parse --abbrev-ref HEAD))
+docker buildx imagetools create -t ${DOCKER_PREFIX}:release ${DOCKER_PREFIX}:${branch}