Topic/776 s3 resource url

coscine/issues#776

src/Migrator/Migrations/Migration202004151354S3ResourceUrl.cs

+using FluentMigrator;
+namespace Coscine.Database.Migration.Migrations
+{
+    //yyyymmddhhmm
+    [Migration(202004151354)]
+    public class Migration202004151354S3ResourceUrl : FluentMigrator.Migration
+    {
+        public override void Down()
+        {
+            Delete.Column("ResourceUrl").FromTable("S3ResourceType");
+        }
+
+        public override void Up()
+        {
+            Alter.Table("S3ResourceType").AddColumn("ResourceUrl").AsString(200).Nullable();
+            Update.Table("S3ResourceType").Set(new { ResourceUrl = "https://s3.rwth-aachen.de" }).AllRows();
+            Alter.Table("S3ResourceType").AlterColumn("ResourceUrl").AsString(200).NotNullable();
+        }
+    }
+}