Use Program cs style entry point

src/Electricity.Api/Program.cs

@@ -3,6 +3,10 @@ using Electricity.Api;
 using Electricity.Api.Services;
 using Microsoft.EntityFrameworkCore;
 
+internal class Program
+{
+    private static int Main(string[] args)
+    {
         var rootCommand = new RootCommand("ElectricityServer is a small REST API to access the electricity log database");
         var connectionStringArgument = new Option<string>(
             name: "--connection-string",
@@ -28,7 +32,7 @@ if (!File.Exists(sqlite3DatabaseFilePath))
         }
 
         var builder = WebApplication.CreateBuilder(args);
-builder.Services.AddDbContext<DatabaseContext>((DbContextOptionsBuilder builder) =>
+        builder.Services.AddDbContext<DatabaseContext>((builder) =>
         {
             builder.UseSqlite($"Data Source={sqlite3DatabaseFilePath}");
         });
@@ -43,6 +47,7 @@ builder.Services.AddCors(options =>
                 });
         });
 
+
         builder.Services.AddControllers()
             .AddJsonOptions(config =>
             {
@@ -69,3 +74,5 @@ app.MapControllers();
         app.Run();
 
         return 0;
+    }
+}