copy over css/fonts folder

package.json

@@ -50,6 +50,7 @@
   },
   "devDependencies": {
     "@types/chrome": "0.0.128",
+    "@types/copy-webpack-plugin": "^6.4.0",
     "@types/jest": "^26.0.20",
     "@types/jquery": "^3.5.5",
     "@types/node": "^14.14.20",
@@ -63,6 +64,7 @@
     "browserify": "^17.0.0",
     "chai": "^4.1.2",
     "clean-webpack-plugin": "^3.0.0",
+    "copy-webpack-plugin": "^7.0.0",
     "del": "^3.0.0",
     "eslint": "^7.17.0",
     "eslint-config-kentcdodds": "^17.3.0",