title: Angular 6 production mode removes Bootswatch theme?
body: <p>I have an Angular 6 app using Bootstrap 4 and a Bootswatch theme (<a href="https://bootswatch.com/lumen/" rel="nofollow noreferrer">Lumen</a>).  The styles and the theme work fine when I compile the site in my test environment using <code>ng serve</code> and also work fine when compiled for my nginx webserver with <code>ng build</code>.  However, when compiling in production mode (<code>ng build --prod</code>) for the webserver, the basic Bootstrap styles work but the Bootswatch theme is apparently not loaded or not effective.  The site looks like plain vanilla Bootstrap 4.</p>
  
  <p>My installation process with the Angular CLI was:</p>
  
  <pre><code>npm install --save bootstrap
  npm install --save @ng-boostrap/ng-bootstrap
  npm install bootswatch
  </code></pre>
  
  <p>The "styles" segment of my <code>angular.json</code> is as follows:</p>
  
  <pre><code>"styles": [
    "node_modules/bootstrap/dist/css/bootstrap.min.css",
    "node_modules/bootswatch/dist/lumen/bootstrap.min.css",
    "src/styles.css"
  ],
  </code></pre>
  
  <p><strong>What's up with the production mode that kills my theme?  And how can I solve it?</strong></p>
  
  <p>Edit: my <code>package.json</code> as requested by a comment:</p>
  
  <pre><code>{
    "name": "neo-analytics",
    "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": "^6.0.3",
      "@angular/common": "^6.0.3",
      "@angular/compiler": "^6.0.3",
      "@angular/core": "^6.0.3",
      "@angular/forms": "^6.0.3",
      "@angular/http": "^6.0.3",
      "@angular/platform-browser": "^6.0.3",
      "@angular/platform-browser-dynamic": "^6.0.3",
      "@angular/router": "^6.0.3",
      "@ng-bootstrap/ng-bootstrap": "^2.1.1",
      "bootstrap": "^4.1.1",
      "bootswatch": "^4.1.1",
      "core-js": "^2.5.4",
      "rxjs": "^6.2.1",
      "rxjs-compat": "^6.2.1",
      "zone.js": "^0.8.26"
    },
    "devDependencies": {
      "@angular/compiler-cli": "^6.0.3",
      "@angular-devkit/build-angular": "~0.6.8",
      "typescript": "~2.7.2",
      "@angular/cli": "~6.0.8",
      "@angular/language-service": "^6.0.3",
      "@types/jasmine": "~2.8.6",
      "@types/jasminewd2": "~2.0.3",
      "@types/node": "~8.9.4",
      "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": "~2.0.0",
      "karma-jasmine": "~1.1.1",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.3.0",
      "ts-node": "~5.0.1",
      "tslint": "~5.9.1"
    }
  }
  </code></pre>