message: Take into account PR comments on `sonarqube-backend` plugin's `router.ts`
  Simplify some code and change response method call to be `json` instead of plain `send`.
diff: */
  import { errorHandler } from '@backstage/backend-common';
  -import express, { RequestHandler } from 'express';
  +import express from 'express';
  import Router from 'express-promise-router';
  import { Logger } from 'winston';
  -import {
  - SonarqubeFindings,
  - SonarqubeInfoProvider,
  -} from './sonarqubeInfoProvider';
  +import { SonarqubeInfoProvider } from './sonarqubeInfoProvider';
  import { InputError } from '../../../../packages/errors';
  /**
  @@ -55,9 +52,9 @@ export async function createRouter(
  const router = Router();
  router.use(express.json());
  - router.get('/findings', (async (request, response) => {
  - const componentKey = request.query.componentKey;
  - let instanceKey = request.query.instanceKey;
  + router.get('/findings', async (request, response) => {
  + const componentKey = request.query.componentKey as string;
  + let instanceKey = request.query.instanceKey as string;
  if (!componentKey)
  throw new InputError('ComponentKey must be provided as a single string.');
  @@ -73,13 +70,13 @@ export async function createRouter(
  );
  }
  - response.send(
  + response.json(
  await sonarqubeInfoProvider.getFindings(componentKey, instanceKey),
  );
  - }) as RequestHandler<unknown, SonarqubeFindings | undefined, unknown, { componentKey: string; instanceKey: string }>);
  + });
  - router.get('/instanceUrl', ((request, response) => {
  - let requestedInstanceKey = request.query.instanceKey;
  + router.get('/instanceUrl', (request, response) => {
  + let requestedInstanceKey = request.query.instanceKey as string;
  if (requestedInstanceKey) {
  logger.info(
  `Retrieving sonarqube instance URL for key ${requestedInstanceKey}`,
  @@ -90,12 +87,13 @@ export async function createRouter(
  `Retrieving default sonarqube instance URL as parameter is inexistant, empty or malformed`,
  );
  }
  - response.send({
  - instanceUrl: sonarqubeInfoProvider.getBaseUrl({
  + const { baseUrl } = sonarqubeInfoProvider.getBaseUrl({
  instanceName: requestedInstanceKey,
  - }).baseUrl,
  });
  - }) as RequestHandler<unknown, { instanceUrl: string }, unknown, { instanceKey: string }>);
  + response.json({
  + instanceUrl: baseUrl,
  + });
  + });
  router.use(errorHandler());
  return router;
  