merge: First tutorial + Example (#804)

## Changes:

- /docs is now a Getting Started page with the first tutorial
- basic-example added

examples/basic-example/pages/api/get-data-file.ts

@@ -0,0 +1,20 @@
+// Next.js API route support: https://nextjs.org/docs/api-routes/introduction
+import type { NextApiRequest, NextApiResponse } from 'next'
+import { promises as fs } from 'fs';
+import path from 'path';
+
+export default async function handler(
+  req: NextApiRequest,
+  res: NextApiResponse<string>
+) {
+  const contentDir = path.join(process.cwd(), '/content');
+  const datasets = await fs.readdir(contentDir);
+  const query = req.query;
+  const { fileName } = query;
+  const dataFile = path.join(
+    process.cwd(),
+    '/content/' + datasets[0] + '/' + fileName
+  );
+  const data = await fs.readFile(dataFile, 'utf8');
+  res.status(200).send(data)
+}