✅ Configure base address in HttpClient in Dependency Injection

            builder.Services.AddHttpClient<NominatimLocationService>(client =>
            {
                client.BaseAddress = new Uri("https://nominatim.openstreetmap.org");
                client.DefaultRequestHeaders.UserAgent.ParseAdd("Mozilla/5.0 (compatible; AcmeInc/1.0)");
            });

public class NominatimLocationService:ILocationService
{
    private readonly HttpClient _httpClient;

    public NominatimLocationService(HttpClient httpClient)
    {
        _httpClient = httpClient;
    }
}