I am building a nuget package which will have a static frontend when packaged and distributed (working currently)

and during development it serves from the spa proxy of a dev server (working as well)

however, I am struggling to find a clean and concise way of differentiating between the packaged version of the application and the local version

I would like to know what the best way to achieve this is

in short, “How do I differentiate between production builds of a Nuget package and local builds”

something like below (but don’t feel pressured to stick to this implementation if you feel there is a better way)

  public static IApplicationBuilder UseRulesEngineDashboard(
       this IApplicationBuilder app,
       Action<DashboardOptions> action = null!)
    {

        var options = new DashboardOptions();

        action?.Invoke(options);

        var env = app.ApplicationServices.GetRequiredService<IWebHostEnvironment>();
#if LOCAL_DEV
        app.MapWhen(context => context.Request.Path.StartsWithSegments(options.BaseUrl), builder =>
        {
            builder.UseSpa(spa =>
            {
                spa.UseProxyToSpaDevelopmentServer(options.ApiUrl);
            });
        });
#else
        app.MapWhen(context => context.Request.Path.StartsWithSegments(options.BaseUrl), builder =>
          builder.Run(async context =>
        {
            await context.Response.WriteAsync("Hello World");
        }));
#endif
        return app;
    }