updates

hooks/build

@@ -5,6 +5,9 @@
 # $IMAGE_NAME var is injected into the build so the tag is correct.
 echo "[***] Build hook running"
 
-docker build --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
-             --build-arg VCS_REF=`git rev-parse --short HEAD` \
-             --build-arg VERSION=`cat VERSION` .
+docker build \
+    --build-arg BUILD_RFC3339=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
+    --build-arg COMMIT=$(git rev-parse --short HEAD) \
+    --build-arg VERSION=$(git describe --tags --always) \
+    -t $IMAGE_NAME .
+