Initialisation

Added the packages and files for the backend server

node_modules/node-abort-controller/index.d.ts

@@ -0,0 +1,47 @@
+// `AbortSignal`,`AbortController` are defined here to prevent a dependency on the `dom` library which disagrees with node runtime.
+// The definition for `AbortSignal` is taken from @types/node-fetch (https://github.com/DefinitelyTyped/DefinitelyTyped) for
+// maximal compatibility with node-fetch.
+// Original node-fetch definitions are under MIT License.
+
+export class AbortSignal {
+  aborted: boolean;
+  reason?: any;
+
+  addEventListener: (
+    type: "abort",
+    listener: (this: AbortSignal, event: any) => any,
+    options?:
+      | boolean
+      | {
+          capture?: boolean;
+          once?: boolean;
+          passive?: boolean;
+        }
+  ) => void;
+
+  removeEventListener: (
+    type: "abort",
+    listener: (this: AbortSignal, event: any) => any,
+    options?:
+      | boolean
+      | {
+          capture?: boolean;
+        }
+  ) => void;
+
+  dispatchEvent: (event: any) => boolean;
+
+  onabort: null | ((this: AbortSignal, event: any) => void);
+
+  throwIfAborted(): void;
+
+  static abort(reason?: any): AbortSignal;
+
+  static timeout(time: number): AbortSignal;
+}
+
+export class AbortController {
+  signal: AbortSignal;
+
+  abort(reason?: any): void;
+}