sample image with instructions in docs

[tacman]

I'm not able to get this to work, can you provide a sample images (png and svg) and command line in the docs please?

curl "https://upload.wikimedia.org/wikipedia/commons/4/4b/Covetrus_Logo.png" -o logo.png
mkdir output
 ./vendor/bin/favicon-generator 'Title of the website' file:logo.png output --theme-color=#00AAAD --icon-background=#00AAAD --root=/

./vendor/bin/favicon-generator 'Title of the website' file:assets/images/books.svg output --theme-color=#00AAAD --icon-background=#00AAAD --root=/
PHP Warning:  file_put_contents(output/apple-touch-icon.png): Failed to open stream: No such file or directory in /home/tac/g/sites/hello/vendor/genkgo/favicon/bin/favicon-generator on line 170
[ERROR] Failed to save output/apple-touch-icon.png
PHP Warning:  proc_open(): posix_spawn() failed: No such file or directory in /home/tac/g/sites/hello/vendor/genkgo/favicon/src/AppleSafariPinGenerator.php on line 33
PHP Warning:  Trying to access array offset on null in /home/tac/g/sites/hello/vendor/genkgo/favicon/src/AppleSafariPinGenerator.php on line 35
PHP Fatal error:  Uncaught TypeError: stream_get_contents(): Argument #1 ($stream) must be of type resource, null given in /home/tac/g/sites/hello/vendor/genkgo/favicon/src/AppleSafariPinGenerator.php:35
Stack trace:
#0 /home/tac/g/sites/hello/vendor/genkgo/favicon/src/AppleSafariPinGenerator.php(35): stream_get_contents()
#1 /home/tac/g/sites/hello/vendor/genkgo/favicon/src/AppleSafariPinGenerator.php(68): Genkgo\Favicon\AppleSafariPinGenerator->Genkgo\Favicon\{closure}()
#2 /home/tac/g/sites/hello/vendor/genkgo/favicon/src/AppleSafariPinGenerator.php(21): Genkgo\Favicon\AppleSafariPinGenerator->tempFile()
#3 /home/tac/g/sites/hello/vendor/genkgo/favicon/src/ApplePackage.php(20): Genkgo\Favicon\AppleSafariPinGenerator->generate()
#4 /home/tac/g/sites/hello/vendor/genkgo/favicon/src/AggregatePackage.php(22): Genkgo\Favicon\ApplePackage->package()
#5 /home/tac/g/sites/hello/vendor/genkgo/favicon/src/FullPackageGenerator.php(16): Genkgo\Favicon\AggregatePackage->package()
#6 /home/tac/g/sites/hello/vendor/genkgo/favicon/bin/favicon-generator(168): Genkgo\Favicon\FullPackageGenerator->package()
#7 /home/tac/g/sites/hello/vendor/genkgo/favicon/bin/favicon-generator(177): {closure}()
#8 /home/tac/g/sites/hello/vendor/bin/favicon-generator(124): include('...')
#9 {main}