Environment variables

Variable	Description	Default
`TRMNL_PROXY_BASE_URL`	Base URL of the native TRMNL service	`https://trmnl.app`
`TRMNL_PROXY_REFRESH_MINUTES`	How often to fetch new images from the cloud service	`15`
`REGISTRATION_ENABLED`	Allow registration via the web UI	`1`
`PASSKEYS_ENABLED`	Enable passkeys (requires HTTPS)	`0`
`SSL_MODE`	SSL mode when not behind a reverse proxy (docs)	`off`
`FORCE_HTTPS`	Enforce HTTPS when the server terminates SSL	`0`
`TRUSTED_PROXIES`	Trusted proxy CIDRs, e.g. `"172.0.0.0/8"` or `*`	`null`
`PHP_OPCACHE_ENABLE`	Enable PHP OPcache	`0`
`TRMNL_IMAGE_URL_TIMEOUT`	Display endpoint response timeout (seconds)	`30`
`APP_TIMEZONE`	PHP timezone (UTC recommended)	`UTC`

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