Set organization avatar

[TimMikeladze]

Would be great to replace the generated organization avatar with something relevant.

[gadicc]

Some possible inspiration:

• avatar-shield
• avatar-key
• golden-key-man
• man-holding-key

[TimMikeladze]

@pradel Assigned to you since you're working with a designer on this. Do they have a github?

[pradel]

Can I close this one?

[davidyaha]

I think so!