@Override
    protected void configure() {
        withEnv("ORACLE_PASSWORD", password);

        // Only set ORACLE_DATABASE if different than the default.
        if (databaseName != DEFAULT_DATABASE_NAME) {
            withEnv("ORACLE_DATABASE", databaseName);
        }

        withEnv("APP_USER", username);
        withEnv("APP_USER_PASSWORD", password);
    }
Testcontainers implementation for Oracle Database Free.
<p>
Supported image: {@code gvenzl/oracle-free}
<p>
Exposed ports: 1521
modules/oracle-free/src/main/java/org/testcontainers/oracle/OracleContainer.java