refactor all the things to use coreServices

Co-authored-by: Johan Haals <johan.haals@gmail.com>
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/app-backend/src/service/appPlugin.test.ts

@@ -17,7 +17,7 @@
 import mockFs from 'mock-fs';
 import { resolve as resolvePath } from 'path';
 import fetch from 'node-fetch';
-import { configServiceRef } from '@backstage/backend-plugin-api';
+import { coreServices } from '@backstage/backend-plugin-api';
 import { startTestBackend } from '@backstage/backend-test-utils';
 import { appPlugin } from './appPlugin';
 import {
@@ -51,7 +51,7 @@ describe('appPlugin', () => {
     await startTestBackend({
       services: [
         [
-          configServiceRef,
+          coreServices.config,
           new ConfigReader({
             backend: {
               listen: { port },

plugins/app-backend/src/service/appPlugin.ts

@@ -16,12 +16,9 @@
 
 import express from 'express';
 import {
-  configServiceRef,
+  coreServices,
   createBackendPlugin,
-  databaseServiceRef,
-  loggerServiceRef,
   loggerToWinstonLogger,
-  httpRouterServiceRef,
 } from '@backstage/backend-plugin-api';
 import { createRouter } from './router';
 
@@ -78,10 +75,10 @@ export const appPlugin = createBackendPlugin({
   register(env, options: AppPluginOptions) {
     env.registerInit({
       deps: {
-        logger: loggerServiceRef,
-        config: configServiceRef,
-        database: databaseServiceRef,
-        httpRouter: httpRouterServiceRef,
+        logger: coreServices.logger,
+        config: coreServices.config,
+        database: coreServices.database,
+        httpRouter: coreServices.httpRouter,
       },
       async init({ logger, config, database, httpRouter }) {
         const {