nagamuslim/debian-gnome-headless — reverse-engineered prompt

Build me a Docker image that gives me a full Debian GNOME desktop I can run on a server with no monitor. I want to open the desktop either from a normal VNC client or directly in a web browser, and I want sound from the desktop to work in the browser too.

Please include the basics so it feels usable right away, like Firefox, VLC, a terminal, file tools, Flatpak with Flathub ready, and a simple way to install extra apps when the container starts. Make the default remote access easy, but let me change passwords, username, SSH keys, screen resolution, language, timezone, apt mirror, and extra packages with environment variables.

The container should disable the lock screen, support dark mode, expose the needed ports for SSH, VNC, web VNC, and audio, and include clear run instructions. Look up current Docker and Debian docs online if you need to.