Add project files.

Startup.cs

@@ -0,0 +1,54 @@
+using Microsoft.AspNetCore.Hosting.Server;
+using System;
+
+namespace TG_Bot_Template
+{
+    public class Startup
+    {
+        public class Startup
+        {
+            private readonly IConfiguration configuration;
+            
+            public Startup()
+            {
+                configuration = new ConfigurationBuilder()
+                    .AddEnvironmentVariables()
+                    .AddJsonFile("appsettings.json", optional: true)
+                    .Build();
+            }
+
+            public void ConfigureServices(IServiceCollection services)
+            {
+                services.AddControllers();
+                services
+                        .AddSwaggerGen();
+
+                services
+                    .AddSingleton(configuration)
+                    .AddSingleton(x => x.CreateScope())
+                    .AddHostedService<TelegramBotService>();
+
+            }
+
+            public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
+            {
+                if (env.IsDevelopment())
+                {
+                    app.UseDeveloperExceptionPage();
+                    app.UseSwagger();
+                    app.UseSwagger(c =>
+                    {
+                        c.RouteTemplate = "/swagger/v1/swagger.json";
+                    });
+                }
+                app.UseStaticFiles();
+                app.UseRouting();
+                app.UseCors(k => { k.AllowAnyHeader(); k.AllowAnyMethod(); k.AllowAnyOrigin(); k.WithMethods("POST", "GET"); });
+                app.UseEndpoints(endpoints =>
+                {
+                    endpoints.MapControllers();
+                });
+            }
+        }
+    }
+}