Basic implemention of multiple selectable images for an egg

The admin side of this is quite ugly when creating/editing a server, but I'm not putting effort into that right now with React Admin soon™

database/migrations/2020_12_12_102435_support_multiple_docker_images_and_updates.php

@@ -0,0 +1,51 @@
+<?php
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class SupportMultipleDockerImagesAndUpdates extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('eggs', function (Blueprint $table) {
+            $table->json('docker_images')->after('docker_image')->nullable();
+            $table->text('update_url')->after('docker_images')->nullable();
+        });
+
+        Schema::table('eggs', function (Blueprint $table) {
+            DB::statement('UPDATE `eggs` SET `docker_images` = JSON_ARRAY(docker_image)');
+        });
+
+        Schema::table('eggs', function (Blueprint $table) {
+            $table->dropColumn('docker_image');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('eggs', function (Blueprint $table) {
+            $table->text('docker_image')->after('docker_images');
+        });
+
+        Schema::table('eggs', function (Blueprint $table) {
+            DB::statement('UPDATE `eggs` SET `docker_image` = JSON_UNQUOTE(JSON_EXTRACT(docker_images, "$[0]"))');
+        });
+
+        Schema::table('eggs', function (Blueprint $table) {
+            $table->dropColumn('docker_images');
+            $table->dropColumn('update_url');
+        });
+    }
+}