Add ASP.NET Identity (cookie auth) and role seeding

backend/Program.cs

@@ -1,3 +1,4 @@
+using backend.Auth;
 using backend.Data;
 using Microsoft.EntityFrameworkCore;
 
@@ -6,14 +7,21 @@ var builder = WebApplication.CreateBuilder(args);
 builder.Services.AddDbContext<AppDbContext>(opt =>
     opt.UseSqlite(builder.Configuration.GetConnectionString("Default")));
 
+builder.Services.AddAppIdentity();
+builder.Services.AddAuthorization();
+
 var app = builder.Build();
 
 using (var scope = app.Services.CreateScope())
 {
-    var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
-    db.Database.Migrate();
+    var sp = scope.ServiceProvider;
+    sp.GetRequiredService<AppDbContext>().Database.Migrate();
+    await IdentitySetup.SeedRolesAsync(sp);
 }
 
+app.UseAuthentication();
+app.UseAuthorization();
+
 app.MapGet("/health", () => Results.Ok(new { ok = true }));
 
 app.Run();