do not store a db image on the repo anymore

.gitlab-ci.yml

@@ -29,7 +29,7 @@ build ui:
   variables:
     IMAGE: ui
 
-build postgres:
-  <<: *docker_build
-  variables:
-    IMAGE: postgres
+#build postgres:
+#  <<: *docker_build
+#  variables:
+#    IMAGE: postgres