usage of underscore prepend for unused paramter and compiler option "noUnusedParameters": true

index.ts

// TODO: replace type any for request and response
// Start writing Firebase Functions
// https://firebase.google.com/docs/functions/typescript
// https://github.com/firebase/functions-samples/tree/master/typescript-getting-started
// https://stackoverflow.com/questions/41685054/clarification-on-typescripts-nounusedparameters-compiler-option

import * as functions from 'firebase-functions';

// We have to import the built version of the server middleware.
const { app } = require('../__sapper__/build/server/server');

const oneHour = 60 * 60
const oneDay = oneHour * 24
const oneWeek = oneDay * 7
const oneMonth = oneWeek * 4

app.get('/', (_request: any, response: any) => {
    response.set(
      'Cache-Control',
      `public, max-age=${oneWeek}, must-revalidate, s-maxage=${oneMonth}, proxy-revalidate, stale-while-revalidate=${oneDay}, stale-if-error=${oneWeek}`
    );
    response.send(app);
})

export const ssr = functions.region('us-central1').https.onRequest(app);