private static void AddColoursFeaturesAndStorage(EcommerceStuContext context)
        {
            if (context.Colours.Any() == false)
            {
                var colours = new List <string>()
                {
                    "Black", "White", "Gold", "Silver", "Grey", "Spacegrey", "Red", "Pink"
                };

                colours.ForEach(c => context.Add(new Colour
                {
                    Name = c
                }));

                context.SaveChanges();
            }

            if (context.Features.Any() == false)
            {
                var features = new List <string>()
                {
                    "3G", "4G", "Bluetooth", "WiFi", "Fast charge", "GPS", "NFC"
                };

                features.ForEach(f => context.Add(new Feature
                {
                    Name = f
                }));

                context.SaveChanges();
            }

            if (context.Storage.Any() == false)
            {
                var storage = new List <string>()
                {
                    "4GB", "8GB", "16GB", "32GB", "64GB", "128GB", "256GB"
                };

                storage.ForEach(s => context.Storage.Add(new Storage
                {
                    Capacity = s
                }));

                context.SaveChanges();
            }
        }