Fix to work with multiple tags

If there are multiple tags pointing to HEAD we need to pick only
one. We'll take one that seems to be a version number. This allows
the version number tag to coexist with another tag, that perhaps
indicates which images it was used to build.

Makefile

@@ -1,5 +1,5 @@
 # Get the version name first by seeing if HEAD is tagged
-version := $(shell git tag --points-at HEAD)
+version := $(shell git tag --points-at HEAD -l '0.*.*' | head -1)
 # And if it wasn't use a git hash
 ifeq ($(version),)
   version := $(shell git log -1 --abbrev=8 --pretty=git%h)