don't expose port 5000 by default

docs/containers/rflood.md

@@ -17,7 +17,6 @@ hide:
     docker run --rm \
         --name rflood \
         -p 3000:3000 \
-        -p 5000:5000 \
         -e PUID=1000 \
         -e PGID=1000 \
         -e UMASK=002 \
@@ -39,7 +38,6 @@ hide:
         image: ghcr.io/hotio/rflood
         ports:
           - "3000:3000"
-          - "5000:5000"
         environment:
           - PUID=1000
           - PGID=1000