Updated dockerfile & build for dockerized puppeteer

package.json

@@ -5,7 +5,7 @@
   "main": "src/app.ts",
   "scripts": {
     "dev": "nodemon src/app.ts",
-    "build": "rimraf ./dist && tsc",
+    "build": "rimraf ./dist && tsc && cp-cli ./src/templates ./dist/templates",
     "licenses:export": "license-exporter --markdown",
     "release": "release-it --only-version",
     "translations:sort": "node sort_translations.js"
@@ -63,6 +63,7 @@
     "@types/express": "^4.17.11",
     "@types/node": "^14.14.22",
     "@types/puppeteer": "^5.4.3",
+    "cp-cli": "^2.0.0",
     "nodemon": "^2.0.7",
     "release-it": "^14.2.2",
     "rimraf": "^3.0.2",
@@ -82,4 +83,4 @@
       "publish": false
     }
   }
-}
+}