Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using MCTransparencia.Models;
using MCTransparencia.Models.DataManager;
using MCTransparencia.Models.Repository;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting; 
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting; 
using Swashbuckle.AspNetCore.Swagger;

namespace MCTransparencia
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<ServidorContext>(options => options.UseSqlServer(Configuration["ConnectionString:ServidoresDB"]));
            services.AddScoped<IDataRepository<Servidor>, ServidorManager>();
            services.AddCors(options =>
            {
                options.AddPolicy("CorsPolicy",
                    builder => builder.AllowAnyOrigin()
                    .AllowAnyMethod()
                    .AllowAnyHeader());
            });
            services.AddControllers();
            services.AddSwaggerGen(c =>
            {
                c.SwaggerDoc("v1", new Microsoft.OpenApi.Models.OpenApiInfo() { Title = "Servidores Api", Version = "v1" });
            });
        }

        // 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.UseHttpsRedirection();

            app.UseStaticFiles();

            app.UseCors("CorsPolicy");

            app.UseForwardedHeaders(new ForwardedHeadersOptions { ForwardedHeaders = Microsoft.AspNetCore.HttpOverrides.ForwardedHeaders.All });

            app.UseRouting();

            app.UseSwagger();
             
            app.UseSwaggerUI(c =>
            {
                c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
            });

            app.UseAuthorization();

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