Database configuration hardcoded

[saoj]

This also would have to come from a config properties file:

    @Override
    public HikariDataSource createPool() {

        HikariConfig config = new HikariConfig();
        config.setDataSourceClassName("org.postgresql.ds.PGSimpleDataSource");

        //Your configurations here...
        config.setUsername("postgres");
        config.setPassword("postgres");
        config.addDataSourceProperty("databaseName", "restapp");
        config.addDataSourceProperty("portNumber", 5432);

        return new HikariDataSource(config);
    }