Startup.cs

    public class Startup
    {
        private IHostingEnvironment _hostingEnvironment;

        public Startup(IConfiguration configuration, IHostingEnvironment env)
        {
            Configuration = configuration;
            _hostingEnvironment = env;
        }
// Omit
        public void ConfigureServices(IServiceCollection services)
        {
            // inject git version
            services.AddSingleton<IAppVersionService, AppVersionService>();
        }
// Omit
}