Hi all Brand new to Prefect today I can run it locally witho

Question

Hi all Brand new to Prefect today I can run it locally without issues but after building with `Dockerfile` I m unable to connect to the UI from my local no matter what I try I ve tried < Cole Murray> s suggestion of mapping port 4200 passing ` network host` etc but I m getting Empty reply from server when I try to curl it This is the full `docker run` command I m running TIA for any suggestions ```docker run rm name prefect p 4200 4200 prefecthq prefect dev python3 7 prefect orion start```

Ryan Peden · Answer

I believe you ll also need to set the `PREFECT ORION API HOST` environment variable to 0 0 0 0 Otherwise it starts up on 127 0 0 1 which won t be visible outside the container

Ryan Peden · Answer

So in your case I believe the full command would be ```docker run rm name prefect env PREFECT ORION API HOST=0 0 0 0 p 4200 4200 prefecthq prefect dev python3 7 prefect orion start```

Ryan Peden · Answer

I also put together a GitHub repo that shows the same thing with Docker Compose <https github com rpeden prefect docker compose blob 0c2561e9df780fa040b26508804527a7e33b63b5 docker compose yml L30>

Matthew Cloney · Answer

Ah perfect thanks < Ryan Peden> I had a hunch it had to do with getting the webserver to listen on `0 0 0 0` but wasn t sure of the exact environment variable to pass Works like a charm thanks

Zanie · Answer

You can also set this in the `prefect orion start` command with the ` host` parameter slightly smiling face