Validate environment variables required by Artalytics services. Each deployment
environment (dev, prod, site) sets these variables directly - no config switching needed.
See [README.md](https://github.com/artalytics/artcore#environment-variables)
for the complete list.
Usage
check_env_api()
check_env_dba()
check_env_app()
check_env_cdn()
Functions
check_env_api(): Validate API auth env vars for OpenAI, OpenSea, and Resend
check_env_dba(): Validate database connection env vars
check_env_app(): Validate application mode flag (demo vs user)
check_env_cdn(): Validate CDN access keys (e.g., Spaces/S3 compatible)
Examples
if (FALSE) { # \dontrun{
check_env_api()
check_env_dba()
check_env_app()
check_env_cdn()
} # }
