use JVB_WS_DOMAIN variable instead of PUBLIC_URL_DOMAIN

.env.sample

@@ -48,7 +48,7 @@ TZ=UTC
 
 # Public URL for the web service (required)
 PUBLIC_URL=https://meet.example.com
-PUBLIC_URL_DOMAIN=meet.example.com
+JVB_WS_DOMAIN=meet.example.com
 
 # Media IP addresses to advertise by the JVB
 # This setting deprecates DOCKER_HOST_ADDRESS, and supports a comma separated list of IPs

compose.yml

@@ -87,7 +87,7 @@ services:
       - jitsijvbconfig:/config
     environment:
     - JVB_AUTH_PASSWORD_FILE=/run/secrets/jvb_auth_password
-    - PUBLIC_URL_DOMAIN
+    - JVB_WS_DOMAIN
     configs:
       - source: entrypoint
         target: /custom-entrypoint.sh