fixed postgresql image name

Dockerfile.postgresql

@@ -1,4 +1,4 @@
-FROM postgresql
+FROM postgres
 MAINTAINER André Bauer <monotek23@gmail.com>
 
 LABEL org.label-schema.build-date="$BUILD_DATE" \

hooks/build

@@ -1,7 +1,6 @@
 #!/bin/bash
 #
 # build hook for dockerhubs autobuild feature
-# builds stable and develop images from only one branch
 #
 
 . "hooks/config"

hooks/config

@@ -1,7 +1,7 @@
 #!/bin/bash
 #
-# build hooks
+# build hooks config
 #
 
-DOCKER_IMAGES="elasticsearch nginx postgresql zammad"
 DOCKER_REPO="monotek/zammad-docker-compose"
+DOCKER_IMAGES="elasticsearch nginx postgresql zammad"