Add controllers for 404 and the root endpoint

src/Middleware/error/defaultRoutes.ts

@@ -0,0 +1,27 @@
+import { Request, Response } from "express";
+
+// Only called when no other route matches
+export function notFoundHandler(req: Request, res: Response) {
+  return res.status(404).json({
+    type: "error",
+    payload: {
+      message: `The ${req.method} HTTP method is implemented for '${req.path}'`,
+      _links: [
+        {
+          rel: "root",
+          href: "/api",
+        },
+      ],
+    },
+  });
+}
+
+export function rootHandler(req: Request, res: Response) {
+  return res.status(200).json({
+    type: "success",
+    payload: {
+      message: "Detleph event API",
+      detail: "This is the API for the Detleph event system",
+    },
+  });
+}