Encrypt Passwords with a Serverless Function

This is the error I'm getting.

{
  "errors": [
    {
      "extensions": {
        "internal": {
          "type": "http_exception",
          "message": "ConnectionFailure Network.Socket.getAddrInfo (called with preferred socket type/protocol: AddrInfo {addrFlags = [AI_ADDRCONFIG], addrFamily = AF_UNSPEC, addrSocketType = Stream, addrProtocol = 0, addrAddress = <assumed to be undefined>, addrCanonName = <assumed to be undefined>}, host name: Just \"host.docker.internal\", service name: Just \"7071\"): does not exist (Name or service not known)"
        },
        "path": "$",
        "code": "unexpected"
      },
      "message": "http exception when calling webhook"
    }
  ]
}

The url in my handler is http://host.docker.internal:7071/api/insertUser so I can't figure out the error.