roadie/Roadie.Api/Program.cs

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Serilog;
using Serilog.Events;
using Serilog.Sinks.RollingFileAlternate;
using System;
using System.Diagnostics;
using System.IO;

namespace Roadie.Api
{
    public class Program
    {
        public static IConfiguration Configuration { get; } = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json", false, true)
            .AddJsonFile(
                $"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json",
                true)
            .AddEnvironmentVariables()
            .Build();

        public static void Main(string[] args)
        {
            Log.Logger = new LoggerConfiguration()
                .ReadFrom.Configuration(Configuration)
                .WriteTo.RollingFileAlternate("logs", "errors", LogEventLevel.Error)
                .CreateLogger();

            try
            {
                Log.Information("Starting web host");

                Trace.Listeners.Add(new LoggingTraceListener());

#if DEBUG
                // Logging Output tests
                Log.Verbose(
                    ":: Log Test: Verbose (Trace,None)"); // Microsoft.Extensions.Logging.LogLevel.Trace and Microsoft.Extensions.Logging.LogLevel.None
                Log.Debug(":: Log Test: Debug"); // Microsoft.Extensions.Logging.LogLevel.Debug
                Log.Information(":: Log Test: Information"); // Microsoft.Extensions.Logging.LogLevel.Information
                Log.Warning(":: Log Test: Warning"); // Microsoft.Extensions.Logging.LogLevel.Warning
                Log.Error(new Exception("Log Test Exception"),
                    "Log Test Error Message"); // Microsoft.Extensions.Logging.LogLevel.Error
                Log.Fatal(":: Log Test: Fatal (Critial)"); // Microsoft.Extensions.Logging.LogLevel.Critical
                Trace.WriteLine(":: Log Test: Trace WriteLine()");
#endif
                Console.WriteLine("");
                Console.WriteLine(@" ____   __    __   ____  __  ____     __   ____  __  ");
                Console.WriteLine(@"(  _ \ /  \  / _\ (    \(  )(  __)   / _\ (  _ \(  ) ");
                Console.WriteLine(@" )   /(  O )/    \ ) D ( )(  ) _)   /    \ ) __/ )(  ");
                Console.WriteLine(@"(__\_) \__/ \_/\_/(____/(__)(____)  \_/\_/(__)  (__) ");
                Console.WriteLine("");

                CreateWebHostBuilder(args).Build().Run();
            }
            catch (Exception ex)
            {
                Log.Fatal(ex, "Host terminated unexpectedly");
            }
            finally
            {
                Log.CloseAndFlush();
            }
        }

        public static IWebHostBuilder CreateWebHostBuilder(string[] args)
        {
            return WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .UseSerilog();
        }
    }

    public class LoggingTraceListener : TraceListener
    {
        public override void Write(string message) => Log.Verbose(message);

        public override void WriteLine(string message) => Log.Verbose(message);
    }
}