4
They stay in the README file. If you click on Raw or edit Readme.Md of any project, you can see the code and how an icon was applied.
On your question regarding the badges/icons that are after the "Donate". They are images. You can upload the image to your project or point out a link if hosted elsewhere. Then just use markdown to apply your icon to the file README.Md.
Markdown:
[![texto alternativo](http://i.imgur.com/tXSoThF.png)](http://www.twitter.com/meunome "texto título")
Can also be created as follows:
[![texto alternativo][1.1]][1]
[1]: http://www.twitter.com/meunome
[1.1]: http://i.imgur.com/tXSoThF.png (texto título)
You can also count on a full list of markdown Markup emoji from github. And use :smile:
, :laughing:
- Complete list here
Some of the images found in most of the projects on Github are using the tool Travis CI. Follow the link to what is and how you can use Travis to create icons
build passing
: https://answall.com/a/197697/122392– WhoisMatt