disable mercure heartbeat

docker/mercure/caddy/Caddyfile

@@ -10,7 +10,7 @@ tls internal
 log
 
 route {
-    redir / /.well-known/mercure/ui/
+    redir / /.well-known/mercure/ui/   # remove in prod
     encode zstd gzip
 
     mercure {
@@ -19,8 +19,9 @@ route {
         subscriber_jwt {env.MERCURE_SUBSCRIBER_JWT_KEY} HS256
         cors_origins https://local.ap2i.opentalent.fr http://ap2i https://local.app.opentalent.fr http://app
         publish_origins https://local.ap2i.opentalent.fr http://ap2i https://local.mercure.opentalent.fr
-        demo
+        demo   # remove in prod
         subscriptions
+        heartbeat 0s
     }
 
     respond /healthz 200