birbmap/Birdmap.API/Program.cs

using Birdmap.DAL;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using NLog;
using NLog.Web;
using System;

namespace Birdmap.API
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var logger = NLogBuilder.ConfigureNLog("NLog.config").GetCurrentClassLogger();

            try
            {
                logger.Debug("Building host...");
                var host = CreateHostBuilder(args).Build();

                logger.Debug("Seeding database...");
                SeedDatabase(host);

                logger.Debug("Running host...");
                host.Run();
            }
            catch (Exception ex)
            {
                logger.Error(ex, "Exception occurred in Main.");
                throw;
            }
            finally
            {
                LogManager.Shutdown();
            }
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration((hostingContext, config) =>
                {
                    config.AddEnvironmentVariables(prefix: "Birdmap_");
                })
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                }).ConfigureLogging(logging =>
                {
                    logging.ClearProviders();
                    logging.AddConsole();
                    logging.SetMinimumLevel(Microsoft.Extensions.Logging.LogLevel.Trace);
                })
                .UseNLog();

        private static void SeedDatabase(IHost host)
        {
            using var scope = host.Services.CreateScope();

            var dbInitializer = scope.ServiceProvider.GetRequiredService<DbInitializer>();
            dbInitializer.Initialize();
        }
    }
}