QML Custom Tile server

I'm trying to plot an offline map using a custom server that my machine is hosting. I've followed the steps of this project for docker. It works when I use my browser (http://localhost:8080/). But when I try to access QML using the code below I just get a Static image GPS output

.

What am I doing wrong? I should see Zambia with a good resolution as I see in the Browser.

QML CODE

import QtQuick 2.12
import QtQuick.Controls 2.5
import QtQuick.VirtualKeyboard 2.4
import QtLocation 5.11
ApplicationWindow {
id: window
width: 640
height: 480
visible: true
title: qsTr("GPS")
Plugin{
    id: plugin_osm
       name: "osm"
       PluginParameter {
             name: "osm.mapping.custom.host"
             value: "http://localhost:8080"
          }

          /*disable retrieval of the providers information from the remote repository.
          If this parameter is not set to true (as shown here), then while offline,
          network errors will be generated at run time*/
          PluginParameter {
             name: "osm.mapping.providersrepository.disabled"
             value: true
          }

       }

Map {
    id: map
    anchors.fill: parent
    plugin: plugin_osm

    zoomLevel: 12
    minimumZoomLevel: 5
    maximumZoomLevel: 17
    center: QtPositioning.coordinate(54.2,16.2)
    activeMapType: supportedMapTypes[supportedMapTypes.length - 1]
}

}

You have 2 errors:

• The host is wrong.
• The coordinate is not to Zambia but to Poland

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtLocation 5.15
import QtPositioning 5.15


ApplicationWindow {
    id: window

    width: 640
    height: 480
    visible: true
    title: qsTr("GPS")

    Plugin {
        id: plugin_osm

        name: "osm"

        PluginParameter {
            name: "osm.mapping.custom.host"
            value: "http://localhost/tile/"
        }
        /*disable retrieval of the providers information from the remote repository.
          If this parameter is not set to true (as shown here), then while offline,
          network errors will be generated at run time*/

        PluginParameter {
            name: "osm.mapping.providersrepository.disabled"
            value: true
        }

    }

    Map {
        id: map

        anchors.fill: parent
        plugin: plugin_osm
        zoomLevel: 12
        minimumZoomLevel: 5
        maximumZoomLevel: 17
        center: QtPositioning.coordinate(-15.4067, 28.2871)
        activeMapType: supportedMapTypes[supportedMapTypes.length - 1]
    }

}

Output: