JS/TS/NPM builds need an npm registry to store intermediate package artifacts.
This can be supplied by the user (e.g. using a hosted registry or even npmjs.com), or a local registry using gitea can be deployed by stack orchestrator.
To use a user-supplied registry set these environment variables:
`CERC_NPM_REGISTRY_URL` and
`CERC_NPM_AUTH_TOKEN`
Leave `CERC_NPM_REGISTRY_URL` un-set to use the local gitea registry.