convert to use service

Program.cs

@@ -1,7 +1,10 @@
+using BinaryDad.Notes.Services;
+
 var builder = WebApplication.CreateBuilder(args);
 
 // Add services to the container.
 builder.Services.AddControllersWithViews();
+builder.Services.AddSingleton<INoteService, FileNoteService>();
 
 var app = builder.Build();
 
@@ -13,15 +16,6 @@ if (!app.Environment.IsDevelopment())
     app.UseHsts();
 }
 
-// create file
-var configuration = app.Services.GetService<IConfiguration>();
-var filePath = configuration["ContentFilePath"];
-
-if (!File.Exists(filePath))
-{
-    File.WriteAllText(filePath, "Hi! Feel free to start typing. Everything will be saved soon after you are done typing.");
-}
-
 app.UseHttpsRedirection();
 app.UseStaticFiles();