dotnet ef migrations automation: Detect changes for migrations

I use the following CLI for DB Migrations:

1. dotnet ef migrations add <Name-of-Migration>
2. dotnet ef database update

However, I am looking for a way for this to happen automatically: when a change in the Model is detected.

So far, I have been able to eliminate Step 2 by doing the following in Startup.cs:

 private void SetupDatabase(IApplicationBuilder app)
    {
        using (var serviceScope = app.ApplicationServices.GetService<IServiceScopeFactory>().CreateScope())
        {
            var context = serviceScope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
            //Migate any pending changes:
            context.Database.Migrate();
        }
    }

This migrates any pending changes created by doing: dotnet ef migrations add <Name-of-Migration> but it does not add migration for any changes in the model. How do I automate this migrations add?