Program.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);
var connectionString = builder.Configuration.GetConnectionString("MySqlConnection");

builder.Services.AddDbContext<AppDbContext>(options => options.UseMySQL(connectionString));
builder.Services.AddDatabaseDeveloperPageExceptionFilter();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddCors(options =>
{
    options.AddPolicy("CorsPolicy",
    builder => builder.AllowAnyHeader()
    .AllowAnyHeader()
    .AllowAnyMethod());
});
builder.Services.AddSwaggerGen();

var app = builder.Build();

app.UseCors("CorsPolicy");
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}
app.UseSwagger(option =>
{
    option.SerializeAsV2 = true;
});
app.UseSwaggerUI(options =>
{
    options.SwaggerEndpoint("/swagger/v1/swagger.json", "v1");
    options.RoutePrefix = string.Empty;
});
app.MapUserEndpoints();
app.MapCategoryEndPoints();
app.MapTransactionEndPoints();
app.MapJestaEndPoints();

app.Run();