[User Story] Share posts on social media

[alexkisielewicz]

User story:

As Site User, I can share interesting posts on popular social media platforms so that my friends can learn about posts that I enjoyed reading

Acceptance criteria:

• Social share buttons are present in full post template
• Buttons can be clicked to share current post on chosen platform

Tasks

• [x] In the full_post template - add a button that the user can click to share a post on social media
• [x] Provide Facebook and Twitter sharing buttons as they are the most popular platforms.
• [x] Add to the template open graph meta tags that are widely used by social platforms to read meta tags of sharing content.