Applying patch config files to a local XM Cloud Docker environment

I'm doing some XM Cloud experiments. Based on the starter kit I've got it running local with Docker: https://github.com/sitecorelabs/xmcloud-foundation-head

There is also a Nextjs project which uses GraphQL. When running jss bootstrap I get this error: 'jss bootstrap' causes JavaScript heap out of memory error on graphql-let step

The fix is a patch config with some changes: https://sitecore.stackexchange.com/a/31669/3309

Does anyone know how I can do this local for XM Cloud? Since it's running in Docker I can't just change any config files or add a patch file. There is a readme file in the starter kit, but a publish doesn't seem to be working: https://github.com/sitecorelabs/xmcloud-foundation-head/blob/main/src/platform/README.md