implemented styles

package.json

@@ -21,7 +21,11 @@
     "babel-plugin-module-resolver": "^4.1.0",
     "babel-polyfill": "^6.26.0",
     "connect-history-api-fallback": "^1.6.0",
+    "css-loader": "^5.2.6",
     "html-webpack-plugin": "^5.3.1",
+    "node-sass": "^6.0.0",
+    "sass-loader": "^11.1.1",
+    "sass-to-string": "^1.5.1",
     "validator": "^13.6.0",
     "webpack": "^5.38.1",
     "webpack-dev-server": "^3.11.2"