Social media share buttons to recommend courses to friends

Hi @ishandeveloper and contributors! We want lots of people to know about this great website.

It would be great to add a social share button which would allow users of the site to recommend either Coursify, or a specific course, to their friends on social media.

We could add a twitter button for example, that automatically generates a tweet that says something like "I'm taking [COURSE_NAME]. Thanks for the recommendation Coursify! Check it out at https://coursify.ishandeveloper.com/"

If you agree with this, please assign the issue to me and I will submit a pull request ASAP. I'm new to github and taking part in hacktoberfest challenge!

Many thanks :)