chore: remove node-fetch from the project

plugins/techdocs-backend/package.json

@@ -34,6 +34,7 @@
     "git-url-parse": "^11.2.0",
     "knex": "^0.21.1",
     "nodegit": "^0.27.0",
+    "cross-fetch": "^3.0.6",
     "winston": "^3.2.1"
   },
   "devDependencies": {

plugins/techdocs-backend/src/default-branch.ts

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import fetch, { RequestInit } from 'node-fetch';
+import fetch from 'cross-fetch';
 import parseGitUrl from 'git-url-parse';
 import { ConfigReader, Config } from '@backstage/config';
 import { loadBackendConfig } from '@backstage/backend-common';

plugins/techdocs-backend/src/service/metadata.ts

@@ -1,4 +1,3 @@
-import fetch from 'node-fetch';
 /*
  * Copyright 2020 Spotify AB
  *
@@ -15,6 +14,8 @@ import fetch from 'node-fetch';
  * limitations under the License.
  */
 
+import fetch from 'cross-fetch';
+
 export class TechDocsMetadata {
   private async getMetadataFile(docsUrl: String) {
     const metadataURL = `${docsUrl}/techdocs_metadata.json`;

plugins/techdocs-backend/src/service/router.ts

@@ -17,7 +17,7 @@ import { Logger } from 'winston';
 import Router from 'express-promise-router';
 import express from 'express';
 import Knex from 'knex';
-import fetch from 'node-fetch';
+import fetch from 'cross-fetch';
 import { Config } from '@backstage/config';
 import Docker from 'dockerode';
 import {