streamline-emr/docker/_streamline-src/database/seeders/CountriesTableSeeder.php

<?php
namespace Database\Seeders;

use Illuminate\Database\Seeder;
use Streamline\Models\Country;

class CountriesTableSeeder extends Seeder {

    /**
     * Run the database seeders.
     *
     * @return void
     */
    public function run() {
        $countries = [
            'CONGO',
            'UGANDA',
            'RWANDA',
            'KENYA',
            'TANZANIA',
            'BURUNDI'
        ];

        foreach ($countries as $country):

            Country::firstOrCreate([
                "name" => $country,
            ]);

        endforeach;
    }

}