Update webpack config

- write bundle to `/build`
- add support for SASS
- improve options view as a proof o concept for styling

package.json

@@ -4,29 +4,41 @@
   "version": "0.9.20",
   "main": "bundle.js",
   "scripts": {
-    "webpack": "webpack --mode=development",
+    "start": "node_modules/.bin/webpack --watch",
     "release": "copyfiles main.css main.min.js background.min.js manifest.json popup.html options.html node_modules/jquery/dist/jquery.min.js node_modules/select2/select2.js src/images/* release"
   },
+  "dependencies": {
+    "axios": "^0.18.0",
+    "mobx": "^5.5.0",
+    "mobx-react": "^5.2.8",
+    "prop-types": "^15.6.2",
+    "react": "^16.7.0",
+    "react-dom": "^16.7.0",
+    "route-parser": "^0.0.5"
+  },
   "devDependencies": {
     "@babel/core": "^7.1.2",
     "@babel/plugin-proposal-class-properties": "^7.1.0",
     "@babel/plugin-proposal-decorators": "^7.1.2",
     "@babel/preset-env": "^7.1.0",
     "@babel/preset-react": "^7.0.0",
-    "axios": "^0.18.0",
     "babel-eslint": "^10.0.1",
     "babel-loader": "^8.0.4",
     "babel-plugin-module-resolver": "^3.1.1",
+    "clean-webpack-plugin": "^1.0.1",
+    "copy-webpack-plugin": "^4.6.0",
     "copyfiles": "^2.1.0",
+    "css-loader": "^2.1.0",
     "eslint": "^5.7.0",
     "eslint-plugin-jest": "^21.25.0",
     "eslint-plugin-react": "^7.11.1",
-    "mobx": "^5.5.0",
-    "mobx-react": "^5.2.8",
-    "prop-types": "^15.6.2",
-    "react": "^16.5.2",
-    "react-dom": "^16.5.2",
+    "file-loader": "^3.0.1",
+    "html-webpack-plugin": "^3.2.0",
+    "node-sass": "^4.11.0",
+    "sass-loader": "^7.1.0",
+    "style-loader": "^0.23.1",
     "webpack": "^4.15.0",
-    "webpack-cli": "^3.0.8"
+    "webpack-cli": "^3.0.8",
+    "webpack-dev-server": "^3.1.14"
   }
 }