Exercise 5: Add Sitewide Banner

[M0nica]

Description

• Update the Header to add a site-wide banner announcing tickets are available to the top of every page.
• Update the banner component so that it has a performant Link to the tickets page.
• The banner should also dynamically pull in the name of the conference from the site configuration in the gatsby-config

Related Exercise:

• https://github.com/M0nica/gatsby-workshop/blob/main/site/INSTRUCTIONS/05_instructions.md

Approach:

• Add static query to the Banner component and use Gatsby's Link component

Files Changed:

• site/src/components/banner.js
• site/src/components/header.js