A docker image of postgres:9.3 but with permissions for remote connections, mostly so readonly connections can connect too!
Use the docker name:
ringly/postgres
In addition, now sets up database according to environment variables:
DB_NAME ringly
DB_USER postgres
DB_PASS
To use:
docker run -d -e DB_NAME=ringly -e DB_USER=postgres -e DB_PASS= ringly/postgres
TODO - read only docs