Convert SVG to PNG using InkScape CLI

There are so many awkward terrible online solutions for converting SVGs to PNG. Here's how to do it locally, on the CLI using InkScape.

# Transparent background
inkscape -h 512 icon.svg -o icon-512x512.png

# With a background color
inkscape -b FFFFFF -h 512 icon.svg -o icon-512x512.png