npm install
PS C:\Users\node-canvas-image-grid> node index.js -h
Usage: index [options]
Options:
-i, --inputs [strings...] input filenames
-o, --output <string> output filename
-r, --resolution [number...] output resolution [width,height]
-p, --padding [number...] padding [x,y]
-h, --help display help for command
node index.js -i https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_92x30dp.png https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_92x30dp.png https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_92x30dp.png -o ./output.png -r 100 100 -p 10 1