diff --git a/drone-runner/docker-compose.yml b/drone-runner/docker-compose.yml
index 97dc984..a59134b 100644
--- a/drone-runner/docker-compose.yml
+++ b/drone-runner/docker-compose.yml
@@ -8,6 +8,8 @@ services:
     volumes:
       - "${HOST_DATA_DIR:-./data}:/data"
     ports:
+      # Optional, used for dashboard:
+      # https://discourse.drone.io/t/drone-agent-port/5914/5
       - "${WEBUI_BIND_ADDR:-127.0.0.1}:${WEBUI_BIND_PORT:-3000}:3000"
     env_file: .env
     restart: unless-stopped