fix: proxy Mercure through nginx at /hub to avoid CORS and match demo-enterprise pattern

Author: mcop1

.docker/nginx.conf

@@ -86,6 +86,11 @@ server {
         deny all;
     }
 
+    # Proxy Mercure hub through nginx (same-origin, no CORS needed)
+    location /hub {
+        proxy_pass http://mercure/.well-known/mercure;
+    }
+
     # Some Admin Modules need this:
     # Server Info, Opcache
     location ~* ^/admin/external {

.env

@@ -33,5 +33,5 @@ PIMCORE_OPENSEARCH_DSN=opensearch://admin:gBsVe!Dut723@opensearch:9200?ssl=true&
 PIMCORE_MESSENGER_TRANSPORT_DSN_PREFIX=amqp://guest:guest@rabbitmq:5672/%2f/
 
 MERCURE_JWT_KEY=CHANGE_ME_THIS_IS_MY_SECRET_KEY_THAT_IS_LONG_ENOUGH_FOR_VALIDATION
-MERCURE_URL=http://localhost:8080/.well-known/mercure
+MERCURE_URL=http://localhost/hub
 MERCURE_SERVER_URL=http://mercure/.well-known/mercure

docker-compose.yaml

@@ -75,9 +75,7 @@ services:
             SERVER_NAME: ':80'
             MERCURE_PUBLISHER_JWT_KEY: 'CHANGE_ME_THIS_IS_MY_SECRET_KEY_THAT_IS_LONG_ENOUGH_FOR_VALIDATION'
             MERCURE_SUBSCRIBER_JWT_KEY: 'CHANGE_ME_THIS_IS_MY_SECRET_KEY_THAT_IS_LONG_ENOUGH_FOR_VALIDATION'
-            MERCURE_EXTRA_DIRECTIVES: |-
-                cors_origins http://localhost
-                anonymous
+            MERCURE_EXTRA_DIRECTIVES: anonymous
         # Uncomment the following line to enable the development mode
         # command: /usr/bin/caddy run -config /etc/caddy/Caddyfile.dev
         ports: