I cannot seed data from json file

I am new to programming with asp.net core mvc. We are required to make a database and seed data from json file. Unfortunately I cannot seed the data from my json file and I can see that the Db is created with tables but no data in them. I am confused with older version where people use startup.cs and I dont know if my project need that or not. I will paste my project and i hope i get some solutions for it. Id appreciate any help. thanks

this is my program.cs

using Cenimas.Data;
using Cenimas.Services;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;

namespace Cenimas
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var builder = WebApplication.CreateBuilder(args);
            builder.Services.AddDbContext<CenimasContext>(options => options.UseSqlServer(
            builder.Configuration.GetConnectionString("DefaultConnection")));
            builder.Services.AddControllersWithViews()
                            .AddRazorRuntimeCompilation();
            builder.Services.AddRazorPages();
            builder.Services.AddTransient<IMailServices, NullMailServices>();
            builder.Services.AddTransient<Seeder>();
            var app = builder.Build();
            // Configure the HTTP request pipeline.
            if (!app.Environment.IsDevelopment())
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }
            else
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseRouting();
            app.UseAuthorization();
            //app.MapRazorPages();
            app.MapControllerRoute(
                name: "default",
                pattern: "{controller=Home}/{action=Index}/{id?}");
            if (args.Length > 0 && args[0].ToLower() == "/seed")
            {
                SeedData(app);
            }
            app.Run();
            void SeedData(IHost app)
            {
                var scopedFactory = app.Services.GetService<IServiceScopeFactory>();
                using (var scope = scopedFactory.CreateScope())
                {
                    var seeder = scope.ServiceProvider.GetService<Seeder>();
                    seeder.Seed();
                }
            }


    }

        
    }
}

and this is my Seeder.cs

using Cenimas.Data.Entities;
using System.Text.Json;
using Microsoft.EntityFrameworkCore;

namespace Cenimas.Data
{
    public class Seeder
    {
        //private readonly CenimasContext context;

        //public Seeder(CenimasContext context)
        //{
        //    this.context = context;
        //}

        //public void Seed()
        //{
            //using (var contex = new CenimasContext(
            //    ServiceProvider.GetRequiredService.DbContextOption<CenimasContext>()))
            //{

            //}


            //if(!context.Products.Any())
            //{
            //    //var filePath = Path.Combine(hosting.ContentRootPath, "Data/art.json");
            //    //var json = File.ReadAllText(filePath);
            //    //var products = JsonSerializer.Deserialize<IEnumerable<Product>>(json);

            //    var order = new List<OrderItem>()
            //    {
            //        new OrderItem()
            //        {
            //            Product = products.First(),
            //            Quantity = 5,
            //            UnitPrice = products.First().Price
            //        }
            //    };

            //    context.Products.AddRange((IEnumerable<Product>)order);
            //    context.SaveChanges();
            //}
        //}


        private readonly CenimasContext ctx;
        private readonly IWebHostEnvironment hosting;

        public Seeder(CenimasContext ctx, IWebHostEnvironment hosting)
        {
            this.ctx = ctx;
            this.hosting = hosting;
        }
        public void Seed()
        {
            ctx.Database.EnsureCreated(); //look at Db and see if its created
            if (!ctx.Movies.Any()) //if DB is not created
            {
                //create a path to our data that will be seeded in our database (in vid 01,04,15)
                var filePath = Path.Combine(hosting.ContentRootPath, "Data/MoviesList.json");
                var json = File.ReadAllText(filePath);
                var movies = JsonSerializer.Deserialize<IEnumerable<Movies>>(json);

                //ctx.Movies.AddRange(movies);

                //var order = ctx.Orders.Where(o => o.Id == 1).FirstOrDefault();    //crreating loop
                //if (order != null)
                //{
                //    order.Items = new List<OrderItem>()
                //    {
                //        new OrderItem()
                //        {
                //            Product = products.First(),
                //            Quantity = 5,
                //            UnitPrice = products.First().Price
                //        }
                //    };
                //}
                //ctx.Orders.Add(order);
                ctx.SaveChanges();
            }


            //}
        }
    }
}

CenimaContext.se

using Cenimas.Data.Entities;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;

namespace Cenimas.Data
{

    public class CenimasContext : DbContext
    {
        //private readonly IConfiguration config;
        private readonly IConfiguration appsettings;

        //public CenimasContext(IConfiguration config)
        //{
        //    this.config = config;
        //}
        public CenimasContext(IConfiguration appsettings)
        {
            this.appsettings = appsettings;
        }


        public DbSet<Movies> Movies { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) // to connect our database
        {
            //var config = new ConfigurationBuilder()
            //    .SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("config").Build();
            base.OnConfiguring(optionsBuilder);
            optionsBuilder.UseSqlServer(appsettings.GetConnectionString("DefaultConnection"));
        }
        //protected override void OnModelCreating(ModelBuilder modelBuilder) // to show our data in tables
        //{
        //    base.OnModelCreating(modelBuilder);
        //    modelBuilder.Entity<Order>()
        //        .HasData(new Order() // then we create migration to it (SeedData)
        //        {
        //            Id = 1,
        //            OrderDate = DateTime.Now,
        //            OrderNumber = "12345"
        //        });
        //}
    }
    
}

Movies.cs

namespace Cenimas.Data.Entities
{
    public class Movies
    {
        public int Id { get; set; }
        public string Title { get; set; }
        public string Year { get; set; }
        public string Runtime { get; set; }
        public string Genre { get; set; }
        public string Awards { get; set; }

    }
}

and a sample of json file MoviesList.json

[
  {
    "Id": 1,
    "Title": "Avatar",
    "Year": "2009",
    "Runtime": "162 min",
    "Genre": "Action, Adventure, Fantasy",
    "Language": "English, Spanish",
    "Awards": "Won 3 Oscars. Another 80 wins & 121 nominations."

  },
  {
    "Id": 2,
    "Title": "I Am Legend",
    "Year": "2007",
    "Released": "14 Dec 2007",
    "Genre": "Drama, Horror, Sci-Fi",
    "Awards": "9 wins & 21 nominations."
  },
  {
    "Id": 3,
    "Title": "300",
    "Year": "2006",
    "Released": "09 Mar 2007",
    "Genre": "Action, Drama, Fantasy",
    "Awards": "16 wins & 42 nominations."
  }
]