How do I use the logo
option in shields.io badges?
For example, something like this
[![Raspberry Pi](https://img.shields.io/badge/gadget-Raspberry%20Pi-pink.svg?logo=http://vectorlogo4u.com/wp-content/uploads/2016/02/RASPBERRY-PI-LOGO-VECTOR.png)](https://www.raspberrypi.org)
renders as this
which doesn't give the expected result.
you need to base64 the logo you can use http://b64.io/ to convert your png to base64 code the link need to be entity escaped your image was too large for the uri, you can scale it to 14px of height.