add turn config values

rootfs/etc/confd/templates/server.yaml.tmpl

@@ -93,14 +93,9 @@ enable_registration_captcha: False
 
 registration_shared_secret: "{{getenv "SHARED_SECRET"}}"
 
-# The public URIs of the TURN server to give to clients
-turn_uris: []
-
-# The shared secret used to compute passwords for the TURN server
-turn_shared_secret: "YOUR_SHARED_SECRET"
-
-# How long generated TURN credentials last
-turn_user_lifetime: "1h"
+turn_uris: [{{getenv "TURN_URIS"}}]
+turn_shared_secret: "{{getenv "TURN_SHARED_SECRET"}}"
+turn_user_lifetime: {{getenv "TURN_USER_LIFETIME"}}
 
 enable_registration: False
 allow_guest_access: False
@@ -134,4 +129,3 @@ perspectives:
       verify_keys:
         "ed25519:auto":
           key: "Noi6WqcDj0QmPxCNQqgezwTlBKrfqehY1u2FyWP9uYw"
-