GCS_BUCKET - GCS bucket to point at.
ROUTING - routing to use. Possible values: react, gatsby, disabled.
PATH_PREFIX - Bucket URL path prefix, defaults to empty string.
INDEX - index path. Default: index.html.
PORT - port to listen at. Default: 80.
FORCE_HTTPS - when value equals to 1 will redirect http to https with 301 http code.
ERROR_404 - error 404 handling. Not available when routing is react. Default: /404.html.
REMOVE_TRAILING_SLASH - when value equals to 1 will remove trailing slash (permanent redirect). This is default behavior in gatsby routing.
BASIC_AUTH - when value equals to 1 will enable basic auth.
BASIC_AUTH_REALM - name of basic auth realm. Default: restricted.
ACCOUNT_<user> - basic auth accounts defined in form of ACCOUNT_<user> = <password> e.g. ACCOUNT_myname=mypassword. Password can be defined as either a plain text or in a form of apr1 hash (used by htpasswd) e.g. ACCOUNT_myname=$apr1$HcwEV./z$5q8WibCrp743km2HltqOn.