the-biergarten-app/WebAPI/Program.cs

using BusinessLayer.Services;
using DataAccessLayer.Repositories;
using DataAccessLayer.Sql;
using WebAPI.Infrastructure;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddOpenApi();

// Dependency Injection
builder.Services.AddSingleton<ISqlConnectionFactory, DefaultSqlConnectionFactory>();
builder.Services.AddScoped<IUserAccountRepository, UserAccountRepository>();
builder.Services.AddScoped<IUserService, UserService>();
var app = builder.Build();

if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
    app.MapOpenApi();
}

app.UseHttpsRedirection();
app.MapControllers();
app.MapFallbackToController("Handle404", "NotFound");
app.Run();