docs: added yarn website:buildandserve script (podman-desktop#3964)

Author: themr0c

package.json

@@ -72,6 +72,7 @@
     "typecheck:renderer": "npm run build:preload:types && tsc --noEmit -p packages/renderer/tsconfig.json",
     "typecheck": "npm run typecheck:main && npm run typecheck:preload && npm run typecheck:renderer && npm run typecheck:preload-dd-extension",
     "website:build": "cd website && yarn run docusaurus build",
+    "website:prod": "cd website && yarn run docusaurus build && yarn serve",
     "website:dev": "cd website && yarn run docusaurus start",
     "prepare": "husky install"
   },