fix: build prod command

Author: KillerCodeMonkey

package.json

@@ -5,7 +5,7 @@
     "ng": "ng",
     "start": "ng serve",
     "build": "ng build",
-    "build:prod": "ng build --prod && cp ./README.md ./dist/angular-stl-model-viewer",
+    "build:prod": "ng build --project angular-stl-model-viewer --prod && cp ./README.md ./dist/angular-stl-model-viewer",
     "build:deploy": "ng build --prod --project examples --base-href angular-stl-model-viewer && gh-pages -d ./dist/examples",
     "test": "ng test",
     "lint": "ng lint",