Apparently, the postgress directory is not getting created correctly. Can somebody more familiar with the subject provide some help/guidance. 

Here is the logs showing the error: 

root@b1s11-node1:~# docker logs 2ed94c962009

+ exec /docker-entrypoint.sh postgres -N 100 -B 128MB

The files belonging to this database system will be owned by user "postgres".

This user must also own the server process.

 ** 

The database cluster will be initialized with locale "en_US.utf8".

The default database encoding has accordingly been set to "UTF8".

The default text search configuration will be set to "english".

 ** 

Data page checksums are disabled.

 ** 

fixing permissions on existing directory /var/lib/postgresql/data ... ok

creating subdirectories ... ok

selecting default max_connections ... 100

selecting default shared_buffers ... 64MB

selecting dynamic shared memory implementation ... posix

creating configuration files ... ok

FATAL:  could not read directory "pg_notify": Unknown error 523

child process exited with exit code 1

initdb: removing contents of data directory "/var/lib/postgresql/data"

creating template1 database in /var/lib/postgresql/data/base/1 ... root@b1s11-node1:~#