These environment variables affect how the app functions when deployed in production.
RAILS_DISABLE_SSL- Disable HSTS and secure cookiesRAILS_ENVREQUIRED - "production"RAILS_MAX_THREADS- Number of threads per Puma process (default: 5)SECRET_KEY_BASEREQUIRED - Unique, secret key used to encrypt and sign cookies and other sensitive dataWEB_CONCURRENCY- Number of Puma processes (default: number of CPUs)