Add ci:build script

Author: hasparus

packages/docs/package.json

@@ -13,6 +13,7 @@
     "start": "gatsby develop",
     "dev": "gatsby develop",
     "build": "gatsby build",
+    "ci:build": "cd ../../ && pnpm build && pnpm run --filter docs build",
     "serve": "gatsby serve",
     "clean": "gatsby clean",
     "logo": "node ./scripts/svg-logo.js",