Запустить скрипт с ng server Angular 6

Мне нужно запускать сценарий каждый раз, когда я использую команду ng serve, я готовлю сервер к получению POST от API. Мой вопрос: когда я запускаю firebase deploy из папки /dist, он запускает этот сервер, поэтому я получаю POST из API в моем приложении.

Ниже приведен файл, который мне нужно запустить через localhost с командой ng serve в Хостинг Firebase при запуске команды firebase deploy.

В моем файле angular.json я пробовал следующее:

                    "assets": [
                        "src/favicon.ico",
                        "src/assets",
                        "src/server-api/server.js"
                    ],

На данный момент я могу выполнить только установив скрипт через package.json.

  "scripts": {
    "app-main": "ng build && node ./server-api/server.js",
}

server.js:

// Get dependencies
const express = require('express');
const path = require('path');
const http = require('http');
const bodyParser = require('body-parser');

// Get our API routes
const api = require('./routes/api');

const app = express();

// Parsers for POST data
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

// Point static path to dist
app.use(express.static(path.join(__dirname, 'dist')));

// Set our api routes
app.use('/api', api);

// Catch all other routes and return the index file
app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, 'dist/index.html'));
});

/**
 * Get port from environment and store in Express.
 */
const port = process.env.PORT || '3000';
app.set('port', port);

/**
 * Create HTTP server.
 */
const server = http.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */
server.listen(port, () => console.info(`API running on localhost:${port}`));

api.js:

const express = require('express');
const router = express.Router();

const firebase = require("firebase");
// Required for side-effects
require("firebase/firestore");

firebase.initializeApp({
    apiKey: "myapikey",
    authDomain: "myapp-30d6b.firebaseapp.com",
    projectId: "myapp-30d6b",
});

// Initialize Cloud Firestore through Firebase
var db = firebase.firestore();

router.post('/notifications', (req, res) => {
    res.status(201).json({
        notification: req.body
    });

    db.collection("notifications").add(req.body)
        .then(function (docRef) {
            console.info("Success: ", docRef.id);
        })
        .catch(function (error) {
            console.error("Error", error);
        });

});

module.exports = router;

package.json:

{
  "name": "myapp",
  "version": "1.0.0",
  "scripts": {
    "app-main": "ng build && node server.js",
    "ng": "ng",
    "start": "ng serve --open",
    "start-hmr": "ng serve --configuration hmr -sm=false",
    "start-hmr-sourcemaps": "ng serve --hmr -e=hmr",
    "build": "node --max_old_space_size=6144 ./node_modules/@angular/cli/bin/ng build --dev",
    "build-stats": "node --max_old_space_size=6144 ./node_modules/@angular/cli/bin/ng build --dev --stats-json",
    "build-prod": "node --max_old_space_size=6144 ./node_modules/@angular/cli/bin/ng build --prod",
    "build-prod-stats": "node --max_old_space_size=6144 ./node_modules/@angular/cli/bin/ng build --prod --stats-json",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "bundle-report": "webpack-bundle-analyzer dist/stats.json"
  },
  "private": true,
  "dependencies": {
    "@agm/core": "1.0.0-beta.2",
    "@angular/animations": "6.0.0",
    "@angular/cdk": "6.0.1",
    "@angular/common": "6.0.0",
    "@angular/compiler": "6.0.0",
    "@angular/core": "6.0.0",
    "@angular/flex-layout": "6.0.0-beta.15",
    "@angular/forms": "6.0.0",
    "@angular/http": "6.0.0",
    "@angular/material": "6.0.1",
    "@angular/material-moment-adapter": "6.0.1",
    "@angular/platform-browser": "6.0.0",
    "@angular/platform-browser-dynamic": "6.0.0",
    "@angular/router": "6.0.0",
    "@ngrx/effects": "6.0.0-beta.1",
    "@ngrx/router-store": "6.0.0-beta.1",
    "@ngrx/store": "6.0.0-beta.1",
    "@ngrx/store-devtools": "6.0.0-beta.1",
    "@ngx-translate/core": "10.0.1",
    "@swimlane/ngx-charts": "8.0.0",
    "@swimlane/ngx-datatable": "12.0.0",
    "@swimlane/ngx-dnd": "4.0.0",
    "@types/prismjs": "1.9.0",
    "angular-calendar": "0.24.0",
    "angular-in-memory-web-api": "0.6.0",
    "angularfire2": "5.0.0-rc.9",
    "body-parser": "1.18.3",
    "chart.js": "2.7.2",
    "classlist.js": "1.1.20150312",
    "core-js": "2.5.6",
    "creditcard.js": "2.1.3",
    "d3": "5.2.0",
    "express": "4.16.3",
    "firebase": "5.0.3",
    "firebase-admin": "5.12.1",
    "font-awesome": "4.7.0",
    "hammerjs": "2.0.8",
    "lodash": "4.17.10",
    "moment": "2.22.1",
    "ng2-charts": "1.6.0",
    "ng2-currency-mask": "5.3.1",
    "ngrx-store-freeze": "0.2.2",
    "ngx-color-picker": "6.0.0",
    "ngx-cookie-service": "1.0.10",
    "ngx-mask": "2.7.3",
    "ngx-toastr": "8.6.0",
    "perfect-scrollbar": "1.3.0",
    "prismjs": "1.14.0",
    "rxjs": "6.1.0",
    "rxjs-compat": "6.1.0",
    "typescript": "2.7.2",
    "web-animations-js": "2.3.1",
    "zone.js": "0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "0.6.0",
    "@angular/cli": "6.0.3",
    "@angular/compiler-cli": "6.0.0",
    "@angular/language-service": "6.0.0",
    "@angularclass/hmr": "2.1.3",
    "@types/jasmine": "2.8.7",
    "@types/jasminewd2": "2.0.3",
    "@types/lodash": "4.14.108",
    "@types/node": "8.9.5",
    "codelyzer": "4.2.1",
    "jasmine-core": "2.99.1",
    "jasmine-spec-reporter": "4.2.1",
    "karma": "1.7.1",
    "karma-chrome-launcher": "2.2.0",
    "karma-coverage-istanbul-reporter": "1.4.2",
    "karma-jasmine": "1.1.2",
    "karma-jasmine-html-reporter": "0.2.2",
    "protractor": "5.3.1",
    "ts-node": "5.0.1",
    "tslint": "5.9.1",
    "webpack-bundle-analyzer": "2.11.1"
  }
}

Решение, которое я ищу:

Мне нужно, чтобы он работал, когда я запускаю ng serve, или когда мое приложение размещается на хостинге Firebase с помощью команды firebase deploy.

Таким образом я могу получать POST в моем приложении Angular.