Fix icon for Iphone OS/home screens

[shadkeene]

We received feedback that when a user is saving beta.weather.gov on their Iphone, the NWS icon isn't showing. I tested on Iphone SE and saved beta.weather.gov on the home screen via the Safari browser. Here's what I see (see bottom two icons of beta.weather.gov on image):

Acceptance criteria:

• [ ] icon that displays on iphone home screens is same as other phone OSs

[jamestranovich-noaa]

Ah, you beat me to it! (I swear I searched the issues for this particular issue).

I found this in New Relic. Original issue description:

Description

In New Relic metrics and dashboards, we have quite the number of requests for an apple touch icon (/apple-touch-icon.png).

It looks like some folks are using beta.weather.gov as a website link on the iOS home screen. This could be important because apple touch icons are part of being mobile/SEO friendly.

Apple touch icons are automatically generated by favicon generators these days -- so we can probably re-use the current favicon images.

Acceptance criteria

• [ ] We have apple-touch-icon.png (and its variants, such as apple-touch-icon-precomposed.png, /apple-touch-icon-120x120.png and /apple-touch-icon-120x120-precomposed.png)

[colinmurphy01]

As part of this we could deploy the app manifest capability to control this.

[colinmurphy01]

Tagging this with the IOC milestone and not V2 or V3 because this work is related to the launch of the site. However since we're getting so many requests for it and that will likely only go up, we should tackle this now.

There's also spiciness around which logo to use. Doing it early and then iterating to get something out there might be a good idea.