Remove MDX-related stuff from our Next.js Telescope frontend

[cindyorangis]

Now that we have a Docusaurus website to hold our docs #2853, we should remove or migrate what we can from Next.js to Docusaurus. Specifically

• src/web/src/pages/about.mdx
• src/web/src/markdown-pages/about.md

Changes needed for src/web/package.json:

• telescope/src/web/package.json

  Line 7 in 34b3790

  "@next/mdx": "12.0.7",

• telescope/src/web/package.json

  Lines 30 to 32 in 34b3790

  	"@mdx-js/loader": "1.6.22",
  	"@mdx-js/mdx": "1.6.22",
  	"@mdx-js/react": "1.6.22",

Changes needed for src/web/next.config.js:

• telescope/src/web/next.config.js

  Lines 12 to 14 in 34b3790

  	const withMDX = require('@next/mdx')({
  	extension: /\.mdx?$/,
  	});

• telescope/src/web/next.config.js

  Lines 66 to 67 in 34b3790

  	const nextConfig = {
  	pageExtensions: ['ts', 'tsx', 'md', 'mdx'],

• telescope/src/web/next.config.js

  Lines 75 to 76 in 34b3790

  	module.exports = withPlugins([
  	[withMDX],

I might have missed something so please check previous PRs and git blame to see where/when the mdx stuff was added

[menghif]

After today's meeting we decided to translate the About page in multiple languages #2962. We also decided to keep the About page on the Telescope app and to remove MDX.

This issue can be converted into removing MDX.

[cindyorangis]

I will morph this issue into removing MDX but as a Telescope Historian and because I implemented the About Page in Gatsby.js and @chrispinkney ported it to Next.js (can't believe we're ripping out more of his code), I'd like to point out that the About Page here is almost identical to the Overview doc. This is because we never clearly defined "About Us" so I used the Overview doc as text to render when I was implementing the About Page feature. This is a great opportunity for everyone planning to be involved in #2962 to create an "About Us" page that is meaningful to you all.

[cindyorangis]

I will also assign myself this issue since this needs some delicate surgery done and I think I know it well enough... maybe fingerscrossed