Replace iOS "Add to Home Screen" icon ("apple-touch-icon")

[andrewcleveland]

(Edit: Changed from feature request to bug report template.)

Please confirm you have done the following before posting your bug report:

• I have enabled debug mode
• I have read checked the Common Issues page

Describe the bug
iOS uses the Snipe-IT logo as the app icon when using the "Add to Home Screen" function in Safari from the Snipe-IT Dashboard page.
The image logo.png does poorly as an app icon for two reasons:

1. iOS puts the transparent logo over black, resulting in black text on a black background.
2. It doesn't fit the square icon aspect ratio, so only part of the logo appears.

To Reproduce
Steps to reproduce the behavior:

1. In Safari, go to https://demo.snipeitapp.com/
2. Tap the share button at the bottom of the screen.
3. Tap "Add to Home Screen".

Expected behavior
The Snipe-IT logo appears as the logo for the app.

Screenshots
Current app icon:

Possible replacement apple-touch-icon image:

App icon with replacement image:

Server (please complete the following information):

• Snipe-IT Version 5.1.5, from Docker image snipe/snipe-it:v5.1.5
• OS: Ubuntu 18.04.5 LTS
• Web Server: Apache 2.4.29
• PHP Version 7.2.24-0ubuntu0.18.04.7

Smartphone (please complete the following information):

• Device: iPhone 7
• OS: iOS 14.6
• Browser: Safari
• Version 14.6
• User-agent: Mozilla/5.0 (iPhone; CPU iPhone OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.1 Mobile/15E148 Safari/604.1

Error Messages
None

Additional context

• Is this a fresh install or an upgrade? Upgrade
• What OS and web server you're running Snipe-IT on: Using Docker image
• What method you used to install Snipe-IT Docker
• Include what you've done so far in the installation, and if you got any error messages along the way. No error messages
• Indicate whether or not you've manually edited any data directly in the database No

The "apple-touch-icon" link tag in resources/views/layouts/default.blade.php specifies the icon image.
First added in 6736b1c in response to #7238.
The feature is documented here: Configuring Web Applications

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