Startup.cs

using BugLab.API.Extensions;
using BugLab.API.Middlewares;
using BugLab.Shared.Validators;
using FluentValidation.AspNetCore;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System.Text.Json.Serialization;

namespace BugLab.API
{
    public class Startup
    {
        private readonly IConfiguration _config;
        private readonly IWebHostEnvironment _environment;

        public Startup(IConfiguration configuration, IWebHostEnvironment environment)
        {
            _config = configuration;
            _environment = environment;
        }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddApiServices(_config, _environment);

            services.AddControllers(opt => opt.InputFormatters.InsertJsonPatch())
                .AddJsonOptions(opt => opt.JsonSerializerOptions.Converters.Add(new JsonStringEnumConverter()))
                .AddFluentValidation(opt => opt.RegisterValidatorsFromAssemblyContaining<AddBugValidator>());
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseSwagger();
                app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "BugLab.API v1"));
            }

            app.UseMiddleware<ExceptionMiddleware>();

            app.UseHttpsRedirection();
            app.UseCors();
            app.UseRouting();

            app.UseAuthentication();
            app.UseAuthorization();

            if (!env.IsDevelopment()) app.UseMiddleware<DemoUserMiddleware>();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllers();
            });
        }
    }
}