angular - Heroku にデプロイする前に localhost で Angular 10.0.3 アプリを起動した後、空白のページを取得する

Question

Angular 10.0.3 アプリのテストで空白のページが表示されます。ここで server.js：

const express = require('express');

const app = express();

app.use(express.static('./src'));
app.get('/*', (req, res) =>
    res.sendFile('index.html', {root: './src'}),
);

app.listen(process.env.PORT || 8080);

パッケージ.json:

{
  "name": "fsdoblakoangular",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "~10.0.3",
    "@angular/common": "~10.0.3",
    "@angular/compiler": "~10.0.3",
    "@angular/core": "~10.0.3",
    "@angular/forms": "~10.0.3",
    "@angular/platform-browser": "~10.0.3",
    "@angular/platform-browser-dynamic": "~10.0.3",
    "@angular/router": "~10.0.3",
    "express": "^4.17.1",
    "rxjs": "~6.5.5",
    "tslib": "^2.0.0",
    "zone.js": "~0.10.3"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.1000.2",
    "@angular/cli": "~10.0.2",
    "@angular/compiler-cli": "~10.0.3",
    "@types/node": "^12.11.1",
    "@types/jasmine": "~3.5.0",
    "@types/jasminewd2": "~2.0.3",
    "codelyzer": "^6.0.0",
    "jasmine-core": "~3.5.0",
    "jasmine-spec-reporter": "~5.0.0",
    "karma": "~5.0.0",
    "karma-chrome-launcher": "~3.1.0",
    "karma-coverage-istanbul-reporter": "~3.0.2",
    "karma-jasmine": "~3.3.0",
    "karma-jasmine-html-reporter": "^1.5.0",
    "protractor": "~7.0.0",
    "ts-node": "~8.3.0",
    "tslint": "~6.1.0",
    "typescript": "~3.9.5"
  }
}

angular.json

{
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
  "newProjectRoot": "projects",
  "projects": {
    "fsdoblakoangular": {
      "projectType": "application",
      "schematics": {},
      "root": "",
      "sourceRoot": "src",
      "prefix": "app",
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "outputPath": "dist/fsdoblakoangular",
            "index": "src/index.html",
            "main": "src/main.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.app.json",
            "aot": true,
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ],
            "styles": [
              "src/styles.css"
            ],
            "scripts": []
          },
          "configurations": {
            "production": {
              "fileReplacements": [
                {
                  "replace": "src/environments/environment.ts",
                  "with": "src/environments/environment.prod.ts"
                }
              ],
              "optimization": true,
              "outputHashing": "all",
              "sourceMap": false,
              "extractCss": true,
              "namedChunks": false,
              "extractLicenses": true,
              "vendorChunk": false,
              "buildOptimizer": true,
              "budgets": [
                {
                  "type": "initial",
                  "maximumWarning": "2mb",
                  "maximumError": "5mb"
                },
                {
                  "type": "anyComponentStyle",
                  "maximumWarning": "6kb",
                  "maximumError": "10kb"
                }
              ]
            }
          }
        },
        "serve": {
          "builder": "@angular-devkit/build-angular:dev-server",
          "options": {
            "browserTarget": "fsdoblakoangular:build"
          },
          "configurations": {
            "production": {
              "browserTarget": "fsdoblakoangular:build:production"
            }
          }
        },
        "extract-i18n": {
          "builder": "@angular-devkit/build-angular:extract-i18n",
          "options": {
            "browserTarget": "fsdoblakoangular:build"
          }
        },
        "test": {
          "builder": "@angular-devkit/build-angular:karma",
          "options": {
            "main": "src/test.ts",
            "polyfills": "src/polyfills.ts",
            "tsConfig": "tsconfig.spec.json",
            "karmaConfig": "karma.conf.js",
            "assets": [
              "src/favicon.ico",
              "src/assets"
            ],
            "styles": [
              "src/styles.css"
            ],
            "scripts": []
          }
        },
        "lint": {
          "builder": "@angular-devkit/build-angular:tslint",
          "options": {
            "tsConfig": [
              "tsconfig.app.json",
              "tsconfig.spec.json",
              "e2e/tsconfig.json"
            ],
            "exclude": [
              "**/node_modules/**"
            ]
          }
        },
        "e2e": {
          "builder": "@angular-devkit/build-angular:protractor",
          "options": {
            "protractorConfig": "e2e/protractor.conf.js",
            "devServerTarget": "fsdoblakoangular:serve"
          },
          "configurations": {
            "production": {
              "devServerTarget": "fsdoblakoangular:serve:production"
            }
          }
        }
      }
    }},
  "defaultProject": "fsdoblakoangular"
}

私がそれを介しng serve --openて始めたとき、それはうまくいきます。node server.jsしかし、プロジェクトのディレクトリから起動したい場合、空白のページが表示されます。

私はこの記事を使用しており、その下からレポを使用しています。パスの問題は何だと思います-スクリプトはコンパイルできません。