To set a HomeScreen icon you have to insert the following line in the file ~/pialert/front/php/templates/header.php between the tags <head> and </head>.
<link rel="apple-touch-icon" href="https://[URL]/[YourIcon]">
Example
<link rel="apple-touch-icon" href="https://raw.githubusercontent.com/leiweibau/Pi.Alert/main/front/img/favicons/glass_black_white.png">
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| glass_black_white.png | glass_blue_white.png | glass_green_white.png | glass_red_white.png | glass_purple_white.png | glass_yellow_white.png |
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| glass_white_black.png | glass_blue_black.png | glass_green_black.png | glass_red_black.png | glass_yellow_black.png | glass_yellow_white.png |
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|---|---|---|---|---|---|
| flat_black_white.png | flat_blue_white.png | flat_green_white.png | flat_red_white.png | flat_purple_white.png | flat_yellow_white.png |
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| flat_white_black.png | flat_blue_black.png | flat_green_black.png | flat_red_black.png | flat_yellow_black.png | flat_yellow_white.png |