[symfony/mercure-bundle] Make MERCURE_URL optional to allow use of FrankenPHP's built-in Mercure (#1514)

symfony/mercure-bundle/0.4/config/packages/mercure.yaml

@@ -0,0 +1,8 @@
+mercure:
+    hubs:
+        default:
+            url: '%env(default::MERCURE_URL)%'
+            public_url: '%env(MERCURE_PUBLIC_URL)%'
+            jwt:
+                secret: '%env(MERCURE_JWT_SECRET)%'
+                publish: '*'

symfony/mercure-bundle/0.4/manifest.json

@@ -0,0 +1,53 @@
+{
+    "bundles": {
+        "Symfony\\Bundle\\MercureBundle\\MercureBundle": ["all"]
+    },
+    "copy-from-recipe": {
+        "config/": "%CONFIG_DIR%/"
+    },
+    "env": {
+        "#1": "See https://symfony.com/doc/current/mercure.html#configuration",
+        "#2": "The URL of the Mercure hub, used by the app to publish updates (can be a local URL)",
+        "MERCURE_URL": "https://example.com/.well-known/mercure",
+        "#3": "The public URL of the Mercure hub, used by the browser to connect",
+        "MERCURE_PUBLIC_URL": "https://example.com/.well-known/mercure",
+        "#4": "The secret used to sign the JWTs",
+        "MERCURE_JWT_SECRET": "!ChangeThisMercureHubJWTSecretKey!"
+    },
+    "docker-compose": {
+        "docker-compose.yml": {
+            "services": [
+                "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"
+            ],
+            "volumes": ["mercure_data:", "mercure_config:"]
+        },
+        "docker-compose.override.yml": {
+            "services": [
+                "mercure:",
+                "  ports:",
+                "    - \"80\""
+            ]
+        }
+    },
+    "aliases": ["mercure"]
+}