Chaining package.json scripts to start Express server and Vue app
&& executes commands in series. vue-cli-service serve && cd ../server && npm start won't work as expected because the script stops at vue-cli-service serve until the server is shut down.
For cross-platform script, concurrently or other similar packages can be used to execute commands in parallel:
"serve": "vue-cli-service serve","start": "concurrently \"npm run serve\" \"cd ../server && npm start\""