Add test edge function

.gitignore

@@ -5,3 +5,4 @@ public
 src/gatsby-types.d.ts
 .env.*
 !.env.example
+.netlify

netlify/edge-functions/hello.ts

@@ -0,0 +1,9 @@
+import { Context } from "https://edge.netlify.com";
+
+export default async (request: Request, context: Context) => {
+  const next = await context.next();
+  console.log("Hello from the edge.", { next });
+  return next;
+};
+
+export const config = { path: "/" };