chore: add yarn command to put compiled stylesheets into builds folder

node_modules/postcss-reporter/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "postcss-reporter",
+  "version": "7.0.5",
+  "description": "Log PostCSS messages in the console",
+  "main": "index.js",
+  "files": [
+    "index.js",
+    "lib"
+  ],
+  "engines": {
+    "node": ">=10"
+  },
+  "repository": "postcss/postcss-reporter",
+  "author": {
+    "name": "David Clark",
+    "email": "david.dave.clark@gmail.com",
+    "url": "https://davidtheclark.com"
+  },
+  "license": "MIT",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/postcss/"
+  },
+  "peerDependencies": {
+    "postcss": "^8.1.0"
+  },
+  "dependencies": {
+    "picocolors": "^1.0.0",
+    "thenby": "^1.3.4"
+  }
+}