anchor.diff:  To access and test if the application is running:
   
   ****
  -`$ psql postgresql://_<user>_:<password>@127.0.0.1:5432/_<database>_ <<< "SELECT 1;"`
  +`$ psql -c "SELECT 1;" postgresql://_<user>_@127.0.0.1:5432/_<database>_`
   ****
   
   == Stopping the Container
  
positive.code: |Database name.
  
  |`*POSTGRESQL_ADMIN_PASSWORD*`
  |Optional password for the Postgres admin user. If this is not set, then remote login to the Postgres account is not possible. Local connections from within the container are always permitted without a password.
  |===
  
  == Settings
  
  PostgresQL settings can be configured with the following environment variables.
  
  .Additional PostgreSQL settings
  [cols="3a,6a,1a",options="header"]
  
negative.code: |Variable name |Description
  
  |`*POSTGRESQL_USER*`
  |Username for the PostgreSQL account to be created. This user has full rights to
  the database.
  
  |`*POSTGRESQL_PASSWORD*`
  |Password for the user account.
  