Port Program to net6.0

Signed-off-by: GitHub <noreply@github.com>

nginx-aspnet-mysql/backend/Program.cs

@@ -1,30 +1,15 @@
-using System;
-using System.IO;
-using System.Collections.Generic;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore;
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Http;
-using Microsoft.AspNetCore.Routing;
-using Microsoft.Extensions.Primitives;
-using MySql.Data;
-using MySql.Data.MySqlClient;
+using MySqlConnector;
 
-class Program
-{
-    public static void Main(string[] args)  => WebHost.CreateDefaultBuilder(args)
-        .Configure(async app =>
-        {
-            app.UseRouting();
+var builder = WebApplication.CreateBuilder(args);
 
 string password = File.ReadAllText("/run/secrets/db-password");
 string connectionString = $"server=db;user=root;database=example;port=3306;password={password}";
 
-            app.UseEndpoints(e =>
-            {
-                e.MapGet("/",  context => {
-                    using MySqlConnection connection = new MySqlConnection(connectionString);
+builder.Services.AddTransient<MySqlConnection>((_provider) => new MySqlConnection(connectionString));
+
+var app = builder.Build();
+
+app.MapGet("/", (MySqlConnection connection) => {
     var titles = new List<string>();
 
     try
@@ -44,23 +29,17 @@ class Program
     }
     catch (Exception ex)
     {
-                        Console.WriteLine(ex.ToString());
-                        context.Response.StatusCode = 500;
-                        return Task.CompletedTask;
+        return Results.Problem(detail: ex.ToString());
     }
     connection.Close();
     
-                    context.Response.StatusCode = 200;
-                    context.Response.WriteAsJsonAsync(titles);
-
-                    return Task.CompletedTask;
-                });
+    return Results.Ok(titles);
 });
 Prepare(connectionString);
 
-        }).Build().Run();
+app.Run();
 
-        private static void Prepare(string connectionString)
+void Prepare(string connectionString)
 {
     using MySqlConnection connection = new MySqlConnection(connectionString);
 
@@ -81,4 +60,3 @@ class Program
     transation.Commit();
     connection.Close();
 }
-}