Bootstrap,css

create your live preview using the following steps

• open your project on github
• look for the settings option and select it
• scroll down , close to the end you should see github pages
• below it you will see Pages settings now has its own dedicated tab! Check it out here!
• select the check it out here! option
• github pages will be open, look for source and change it from none to master
• select save.
• return to this same page again and you will see a live preview link generated

There are no url to see the preview in github brother. Before submit the output please check it properly.