Add project files.

StockDBEF/Program.cs

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+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Serilog;
+using StockDBEF.Models;
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using System.Threading;
+
+// DI, SeriLog, Settings
+
+namespace StockDBEF
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var builder = new ConfigurationBuilder();
+            BuildConfig(builder);
+
+            Log.Logger = new LoggerConfiguration()
+                .ReadFrom.Configuration(builder.Build())
+                .Enrich.FromLogContext()
+                .WriteTo.Console()
+                .CreateLogger();
+
+            Log.Logger.Information("Application starting");
+
+            var host = Host.CreateDefaultBuilder()
+                .ConfigureServices((context, services) =>
+                {
+                    services.AddEntityFrameworkSqlite();
+                    services.AddHostedService<DatabaseStartup>();
+                    //services.AddDbContext<StockDBContext>();
+                    services.AddDbContextPool<StockDBContext>(o =>
+                    {
+                        o.UseSqlite("Data Source=Stocks.db");
+                    });
+
+                    services.AddTransient<IGreetingService, GreetingService>();
+                })
+                .UseSerilog()
+                .Build();
+
+            var svc = ActivatorUtilities.CreateInstance<GreetingService>(host.Services);
+            svc.Run();
+        }
+
+        static void BuildConfig(IConfigurationBuilder builder)
+        {
+            builder.SetBasePath(Directory.GetCurrentDirectory())
+                .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
+                .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json", optional: true)
+                .AddEnvironmentVariables();
+        }
+
+
+    }
+
+    public class DatabaseStartup : IHostedService
+    {
+        private readonly IServiceProvider serviceProvider;
+        public DatabaseStartup(IServiceProvider serviceProvider)
+        {
+            this.serviceProvider = serviceProvider;
+        }
+
+        public async Task StartAsync(CancellationToken cancellationToken)
+        {
+            using (var scope = serviceProvider.CreateScope())
+            {
+                var db = scope.ServiceProvider.GetRequiredService<StockDBContext>();
+                await db.Database.EnsureCreated();
+                // or 
+                await db.Database.MigrateAsync();
+            }
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
+    }
+
+}