docker compose comments, only noVNC by default, use fgc volume as in README

docker-compose.yml

@@ -1,11 +1,11 @@
-# docker compose up
+# start with `docker compose up`
 services:
   free-games-claimer:
     container_name: fgc # is printed in front of every output line
     image: ghcr.io/vogler/free-games-claimer # otherwise image name will be free-games-claimer-free-games-claimer
     build: .
     ports:
-      - "5900:5900"
-      - "6080:6080"
+      # - "5900:5900" # VNC server
+      - "6080:6080" # noVNC (browser-based VNC client)
     volumes:
-      - ./data:/fgc/data
+      - fgc:/fgc/data