Move the VOLUME portion to the bottom.  It seems sed has no effect on the config otherwise.
Configuration changes won't work if the cluster isn't created.  Revert back to creating cluster before config changes.
Merge origin/master

Conflicts:
	Dockerfile
Merge origin/master

Conflicts:
	Dockerfile
Merge branch 'master' of https://github.com/longnan/ksys-docker-postgresql

Conflicts:
	Dockerfile