title: PostgreSQL database is not created using keycloak
body: <p>I need to create a new external PostgreSQL database to replace the default H2 database that Keycloak uses by default. When I create a database using the keycloak file, the database is not created when running Keycloak:</p>
  <pre class="lang-java prettyprint-override"><code>Caused by: org.postgresql.util.PSQLException: FATAL: database &quot;sso&quot; does not exist
      at org.postgresql.jdbc@42.2.5//org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2440)
      at org.postgresql.jdbc@42.2.5//org.postgresql.core.v3.QueryExecutorImpl.readStartupMessages(QueryExecutorImpl.java:2559)
      at org.postgresql.jdbc@42.2.5//org.postgresql.core.v3.QueryExecutorImpl.&lt;init&gt;(QueryExecutorImpl.java:133)
      at org.postgresql.jdbc@42.2.5//org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:250)
      at org.postgresql.jdbc@42.2.5//org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:49)
      at org.postgresql.jdbc@42.2.5//org.postgresql.jdbc.PgConnection.&lt;init&gt;(PgConnection.java:195)
      at org.postgresql.jdbc@42.2.5//org.postgresql.Driver.makeConnection(Driver.java:454)
      at org.postgresql.jdbc@42.2.5//org.postgresql.Driver.connect(Driver.java:256)
      at org.jboss.ironjacamar.jdbcadapters@1.4.22.Final//org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:321)
      ... 57 more
  </code></pre>
  <p>When I am giving the application database as the value I am able to connect to the database. But my intention is to connect to a different database:</p>
  <pre class="lang-sh prettyprint-override"><code>cat Keycloak 
      
  CREATE DATABASE IF NOT EXISTS sso;
  
  docker-compose.yaml 
      
      data-keycloak:
        image: jboss/keycloak:$KEYCLOAK_TAG
        container_name: data-keycloak-container
        ports:
          - &quot;$KEYCLOAK_EXTERNAL_PORT:$KEYCLOAK_INTERNAL_PORT&quot;
        depends_on:
          - data-keycloak-db
        environment:
          KEYCLOAK_USER: $KEYCLOAK_USER
          KEYCLOAK_PASSWORD: $KEYCLOAK_PASSWORD
          DB_VENDOR: $KEYCLOAK_DB_VENDOR
          DB_USER: $KEYCLOAK_DB_USER
          DB_PASSWORD: $KEYCLOAK_DB_PASSWORD
          DB_DATABASE: $KEYCLOAK_DB_DATABASE
          DB_ADDR: $KEYCLOAK_DB_ADDR
          DB_SCHEMA: public
          WAIT_HOSTS: data-keycloak-db:$data_KEYCLOAK_DB_PORT
          KEYCLOAK_IMPORT: /tmp/keycloak-realm.json
        volumes:
          - ./keycloak-realm.json:/tmp/keycloak-realm.json
          - ./keycloak:/tmp/keycloak
        networks:
          - $data_NETWORK
  </code></pre>