Update MongoDB service configuration to use a secure keyfile path

docker-compose.yml

@@ -9,7 +9,8 @@ services:
       - ludo-net
     volumes:
       - ludo-mongo-data:/data/db
-      - ./mongo-keyfile:/etc/mongo-keyfile:ro
+      - /opt/ludo-secrets/mongo-keyfile:/etc/mongo-keyfile:ro
+      # - ./mongo-keyfile:/etc/mongo-keyfile:ro
       # - ./mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js:ro
     command:
       - bash