Unbound classpath container: JRE System Library

https://sites.miis.edu/dreadkingrathalos/2017/06/05/unbound-classpath-container-jre-system-library-resolved/

CSS Flexbox

Css Flexbox: https://css-tricks.com/snippets/css/a-guide-to-flexbox/

Git: VideoTutorial

https://www.youtube.com/watch?v=HiXLkL42tMU