misc: replace mailcow favicon by galae favicon

[PhilippeAccorsi]

Related to #39

[lebouquetin]

@PhilippeAccorsi @piRGoif what about using a 512x512 px image file?

(if the usage is pure favicon, the one you have 64x64 should be ok)

[PhilippeAccorsi]

@PhilippeAccorsi @piRGoif what about using a 512x512 px image file?

I don't know if its necessary to have this size of favicon. But this is the authorized size for favicon on mailcow : 16x16, 32x32, 64x64, 128x128 and 256x256 (information from here https://docs.mailcow.email/manual-guides/SOGo/u_e-sogo/#change-favicon)

@lebouquetin

[piRGoif]

On SOGo currently I'm getting another icon as the one modified ? This don't includes the configuration modification to point to the custom icon right ?

About the image size in pixels : on Prod the existing icon doesn't seemed to be cached (there is an etag header though), so I would say just be very careful about the file size in bytes ?

[lebouquetin]

About the image size in pixels : on Prod the existing icon doesn't seemed to be cached (there is an etag header though), so I would say just be very careful about the file size in bytes ?

So, do you suggest to keep the 64x64 one? (I'm ok with this, I just need to make your recommandation cristal-clear)

[piRGoif]

So, do you suggest to keep the 64x64 one?

• The 512x512px file you provided weights 16,37KB
• Current 16x16px SOGo icon is 5,38KB
• MailCow custom icon is 4,9KB

The 512x512 file is 3 times larger, but it stays very small, so ok for me to get the new 512x512 file.