You are running volto in development mode. So your browsers tries to download some files from localhost:PORT of volto + 1. In your case localhost:3001
Since you are accessing volto from an IP these request to localhost:3001 fail. You can change that telling volto the IP with variable HOST.
Now depending what you want you have various options:
- Start volto with production mode if you just want it to be accessible from the IP
yarn build
yarn start:prod
- Port forwarding to the server so you can access it from localhost if you want to develop
I don't use cookiecutter so I don't know if you already have some nice comands to do it.
I install volto this way: Create a Volto project without a backend – Frontend – Development — Plone Documentation v6.0
And here how do a simple deployment: Simple deployment – Frontend – Deploying — Plone Documentation v6.0