Why IP from website is gateway that not what I assigned the IP?

[sarukomine]

I want to assign static IP to the website, I googled many tutorial then follow them to update docker-compose yaml file as below.

WEBSERVER_SUBNET=192.168.0.0/16
WEBSERVER_IP_RANGE=192.168.10.0/24
WEBSERVER_GATEWAY=192.168.10.254
WEBSERVER_IP=192.168.10.10

version: '3.5'

networks:
  webserver:
    driver: ${NETWORKS_DRIVER}
    ipam:
      config:
        - subnet: ${WEBSERVER_SUBNET}
          gateway: ${WEBSERVER_GATEWAY}
          ip_range: ${WEBSERVER_IP_RANGE}
services:
  php-fpm:
    extra_hosts:
      - "dockerhost:${DOCKER_HOST_IP}"
      - "website-one.test:${WEBSERVER_IP}"
      - "wevsite-two.test:${WEBSERVER_IP}"
    networks:
      - webserver
      # - frontend
      # - backend
  nginx:
    extra_hosts:
      - "website-one.test:${WEBSERVER_IP}"
      - "wevsite-two.test:${WEBSERVER_IP}"
    networks:
      webserver:
        ipv4_address: ${WEBSERVER_IP}
      frontend:
      backend:

Then I can see nginx container are using 192.168.10.10 this IP and this is correct.

[
    {
        "Name": "xxx_webserver",
        "Id": "29546d3a16b20afaf3fa0c8a425affcdf84723665cfbbb431616c5b538b1cdeb",
        "Created": "2021-06-24T01:53:51.641484508Z",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "192.168.0.0/16",
                    "IPRange": "192.168.10.0/24",
                    "Gateway": "192.168.10.254"
                }
            ]
        },
        "Internal": false,
        "Attachable": true,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "b7e6a5f9bdb5350049230f962f37ccf25f4b27cf7b67711764e97b3ea51db7d2": {
                "Name": "xxx_nginx_1",
                "EndpointID": "8963a49220e31aadd567f771909e47f43aad4fcb6577a058c7d9a39b0560a602",
                "MacAddress": "02:42:c0:a8:0a:0a",
                "IPv4Address": "192.168.10.10/16",
                "IPv6Address": ""
            },
            "c4bd16a7ca482f7f1f011d923fc694f5a7f7543ecfda3020b1c8009b50260e95": {
                "Name": "xxx_php-fpm_1",
                "EndpointID": "df03ed30398490ff63a03964401e578b0a6fe3e40a9f0af5f3f6689196a45556",
                "MacAddress": "02:42:c0:a8:0a:00",
                "IPv4Address": "192.168.10.0/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {
            "com.docker.compose.network": "webserver",
            "com.docker.compose.project": "xxx",
            "com.docker.compose.version": "1.29.2"
        }
    }
]

But I use $request->ip() to get the IP and it give me that is 192.168.10.254, it is gateway not what I assign the IP, I am not sure is that correct or not...