[BUG] host-gateway keyword stopped working

[kale1d0code]

Description

I have a dev container project which used the host-gateway keyword to populate the name host.docker.internal with the host ip address of the docker engine.

This allowed me to connect services I develop to other services running in their own containers after vscode forwards their ports to the host.

this behaviour no longer works as I am now getting the following from the service I am developing
cause: Error: getaddrinfo ENOTFOUND docker.host.internal
at GetAddrInfoReqWrap.onlookupall [as oncomplete] (node:dns:122:26) {
errno: -3008,
code: 'ENOTFOUND',
syscall: 'getaddrinfo',
hostname: 'docker.host.internal'
}
}

I am not sure when this regressed however I have not touched this project for nearly a year

Steps To Reproduce

add the following to your workspace container

    extra_hosts:
    - "host.docker.internal:host-gateway"

and attempt to ping host.docker.internal

No response

Compose Version

v2.39.1

Docker Environment

Client:
 Version:           28.3.3-1
 API version:       1.51
 Go version:        go1.23.11
 Git commit:        980b85681696fbd95927fd8ded8f6d91bdca95b0
 Built:             Wed Jul 16 10:32:48 UTC 2025
 OS/Arch:           linux/amd64
 Context:           default

Server:
 Engine:
  Version:          28.3.3-1
  API version:      1.51 (minimum version 1.24)
  Go version:       go1.23.11
  Git commit:       bea959c7b793b32a893820b97c4eadc7c87fabb0
  Built:            Fri Jul 25 08:13:16 2025
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.7.28-1
  GitCommit:        b98a3aace656320842a23f4a392a33f46af97866
 runc:
  Version:          1.1.15-1
  GitCommit:        bc20cb4497af9af01bea4a8044f1678ffca2745c
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

Anything else?

No response