Some settings

compose.yaml

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+
+services:
+###> symfony/mercure-bundle ###
+  mercure:
+    image: dunglas/mercure
+    restart: unless-stopped
+    environment:
+      # Uncomment the following line to disable HTTPS,
+      #SERVER_NAME: ':80'
+      MERCURE_PUBLISHER_JWT_KEY: '!ChangeThisMercureHubJWTSecretKey!'
+      MERCURE_SUBSCRIBER_JWT_KEY: '!ChangeThisMercureHubJWTSecretKey!'
+      # Set the URL of your Symfony project (without trailing slash!) as value of the cors_origins directive
+      MERCURE_EXTRA_DIRECTIVES: |
+        cors_origins http://127.0.0.1:8000
+    # Comment the following line to disable the development mode
+    command: /usr/bin/caddy run --config /etc/caddy/dev.Caddyfile
+    healthcheck:
+      test: ["CMD", "curl", "-f", "https://localhost/healthz"]
+      timeout: 5s
+      retries: 5
+      start_period: 60s
+    volumes:
+      - mercure_data:/data
+      - mercure_config:/config
+###< symfony/mercure-bundle ###
+
+volumes:
+###> symfony/mercure-bundle ###
+  mercure_data:
+  mercure_config:
+###< symfony/mercure-bundle ###