Set API Key into an environment variable

redjanym/fcm-bundle/1.1/config/packages/redjan_ym_fcm.yaml

@@ -1,2 +1,2 @@
 redjan_ym_fcm:
-    firebase_api_key: "12345"
+    firebase_api_key: '%env(resolve:FCM_SERVER_KEY)%'

redjanym/fcm-bundle/1.1/manifest.json

@@ -4,5 +4,8 @@
     },
     "copy-from-recipe": {
         "config/": "%CONFIG_DIR%/"
+    },
+    "env": {
+        "FCM_SERVER_KEY": "YOUR_FIREBASE_CLOUD_MESSAGING_SERVER_KEY"
     }
 }