Add API for frameworks and examples (#3514)

* Add API for frameworks and examples

* Adjust headers

* Update frameworks list

* Always use latest

* Add types

* Use now repo for downloading and listing

* Use .existsSync

* Remove unused packages

* Use 307 for redirect

* Add examples

* Update tsconfig.json

Co-Authored-By: Steven <steven@ceriously.com>

* Make examples unique

* Remove detectors from frameworks API

* Use /api instead of Next.js

* Install dependencies

* Rename project

* Change name

* Empty

* Change name

* Update api/tsconfig.json

Co-Authored-By: Steven <steven@ceriously.com>

* Update examples

Co-authored-by: Steven <steven@ceriously.com>

api/_lib/examples/example-list.ts

@@ -0,0 +1,21 @@
+// Currently we read & parse the README file from zeit/now-examples
+// TODO: create a `manifest.json` for zeit/now-examples
+
+import fetch from 'node-fetch';
+
+/**
+ * Fetch and parse the `Frameworks and Libraries` table
+ * in the README file of zeit/now-examples
+ */
+export async function getExampleList() {
+  const response = await fetch(
+    `https://raw.githubusercontent.com/zeit/now-examples/master/manifest.json`
+  );
+
+  if (response.status !== 200) {
+    console.log('manifest.json missing in zeit/now-examples');
+    return null;
+  }
+
+  return response.json();
+}