Document FreqUI usage

docker-compose.yml

@@ -14,6 +14,11 @@ services:
     container_name: freqtrade
     volumes:
       - "./user_data:/freqtrade/user_data"
+    # Expose api on port 8080 (localhost only)
+    # Please read the https://www.freqtrade.io/en/latest/rest-api/ documentation
+    # before enabling this.
+    #ports:
+    #  - "127.0.0.1:8080:8080"
     # Default command used when running `docker compose up`
     command: >
       trade