//Only use available DI service for IWebHostEnvironment
public StockController(IWebHostEnvironment webHostEnvironment)
{
rootPath = Path.Combine(webHostEnvironment.WebRootPath, folder);
inList = LocalDataAccess.ReadDataStockIn(rootPath, stockInFile);
outList = LocalDataAccess.ReadDataStockOut(rootPath, stockOutFile);
products = LocalDataAccess.ReadDataProduct(rootPath, productFile);
}