version: '2.1'
services:

  database:
    image: postgres:9.5.6
    environment:
      POSTGRES_PASSWORD: secretpass
    ports:
      - 5432:5432

docker-compose --file docker-compose.pg.yml up --build

Starting app_database_1 ...
Starting app_database_1 ... done
Attaching to app_database_1
database_1  | LOG:  database system was shut down at 2017-09-22 18:48:55 UTC
database_1  | LOG:  MultiXact member wraparound protections are now enabled
database_1  | LOG:  database system is ready to accept connections
database_1  | LOG:  autovacuum launcher started

psql postgresql://postgres:secretpass@0.0.0.0

database_1  | FATAL:  password authentication failed for user "postgres"
database_1  | DETAIL:  Connection matched pg_hba.conf line 95: "host all all 0.0.0.0/0 md5"