Docker: Failed to get D-Bus connection: Operation not permitted

Symptom:

When we build Postgresql 9.5 docker image on  Oracle Linux 7-slim ( FROM oraclelinux:7-slim)
it error out
Docker: Failed to get D-Bus connection: Operation not permitted

Solution:

It is due to Oracle Linux 7-slim is very slim. It takes systemd function out of the image.  D-bus need systemd to function.  In order to fix it ,we need to use a bit heavy linux image which includes systemd.  To use Oracle Linux 7 would fix it (FROM oraclelinux:7)

The full Dockerfile details of Postgresql 9.5 is on github link