if you want to publish it to linux ,you should replace wwwroot\Wkhtmltox\wkhtmltoimage.exe with wwwroot\Linux\wkhtmltoimage.exe,
replace wwwroot\Wkhtmltox\wkhtmltopdf.exe with wwwroot\Linux\wkhtmltopdf.exe.
The folder you publish on linux should has high permission by executing command: chmod -R 777 *