fix(*): handled 404s, set correct accept headers

src/types/NotFoundError.ts

@@ -0,0 +1,7 @@
+export class NotFoundError extends Error {
+  constructor(public url: string) {
+    super(`Error: Resource at ${url} was not found`)
+    this.name = 'NotFoundError'
+    Object.setPrototypeOf(this, NotFoundError.prototype)
+  }
+}