add convert.sh

convert.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+for size in 48 72 96 144 192 512; do convert -scale "${size}x${size}" rest/static/clip/icon.svg -colors 255 -type Palette  -background white -quality 75 -alpha background  rest/static/clip/${size}.png; done