octoprint-klipper-docker/unitconfig.json

{
    "listeners": {
        "*:80": {
            "pass": "routes"
        }
   },
    "routes": [
        {
            "match": {
                "uri": "*"
            },

            "action": {
                "proxy": "http://127.0.0.1:5000"
            }
        }
    ]
}