Adjustable Image Quality

[blockchain-expert]

Include some configuration to set the image quality. It normally takes around 248 kb in my case. It would be better if can reduce the image size by reducing the image quality configuration.

[bencevans]

Notes for potential Linux implementation:

• ImageMagick --quality [1-100]. Tries to estimate else 92. has https://imagemagick.org/script/command-line-options.php#quality
• Scrot --quality [1-100]. Defaults to 75. https://imagemagick.org/script/command-line-options.php#quality