Update hook to build a little bit faster

Signed-off-by: solidnerd <niclas@mietz.io>

hooks/build

@@ -3,9 +3,10 @@
 # Docker Daemon Build Hook
 # $IMAGE_NAME var is injected into the build so the tag is correct.
 
+docker pull ${DOCKER_REPO}:latest
+
 docker build \
-		--pull \
-		--cache-from=${IMAGE_NAME} \
+		--cache-from=${DOCKER_REPO}:latest \
 		--build-arg=BUILD_DATE="$(date +"%Y-%m-%d %H:%M:%S%:z")" \
 		--build-arg=VCS_REF="$(git rev-parse --short HEAD)" \
 		--build-arg=VERSION="$(cat VERSION)" \