compiling scss on yarn start

package.json

@@ -35,7 +35,7 @@
     "build-css": "node-sass-chokidar src/styles/ -o src/styles/build",
     "watch-css": "node-sass-chokidar src/styles/ -o src/styles/build --watch --recursive",
     "start-js": "react-scripts start",
-    "start": "npm-run-all -p watch-css start-js",
+    "start": "npm-run-all -p build-css watch-css start-js",
     "build-js": "react-scripts build",
     "build": "npm-run-all build-css build-js",
     "test": "react-scripts test --env=jsdom",