feat(webtop): add dev toolchain mods and Docker access

webtop/README.md

@@ -3,6 +3,15 @@
 [Webtop](https://docs.linuxserver.io/images/docker-webtop): a full Ubuntu
 XFCE desktop in the browser, from the LinuxServer image, streamed by Selkies.
 
+Comes with Go, Node.js 24, Python 3 and zsh via LinuxServer mods, the
+`code-server-npmglobal` mod so `npm install -g` lands under `/config` and
+persists, plus `bubblewrap`, `gh`, `git`, `glab`, `unzip` and `zip` through
+`INSTALL_PACKAGES`. The `code-server-*` mods carry that name upstream but are
+plain Ubuntu installers that work on any LinuxServer Ubuntu image.
+
+Mods install into each new container, so the first start after a recreate
+takes a few minutes longer before the desktop answers.
+
 ## Setup
 
 1. Set `PASSWORD`.
@@ -26,6 +35,20 @@ shell and `sudo`, to anyone who opens the domain.
 `PUID`/`PGID` are pinned to `1000` in `compose.yml`; the `Dockerfile` depends
 on that (see Storage).
 
+## Docker access
+
+The `universal-docker` mod installs the Docker CLI but no daemon, so the host
+socket is bind-mounted at `/var/run/docker.sock`. Containers started from
+inside are siblings on the host, not children: bind mounts in them resolve
+against host paths, so a path under `/config` will not exist unless the same
+path exists on the host.
+
+The socket belongs to the host's `docker` group, which `abc` is not in; run
+`docker` under `sudo` (the password is `PASSWORD`). Handing a container the
+socket is equivalent to giving it root on the host, accepted here because this
+is a single-user desktop. The `:ro` flag only marks the socket file read-only;
+it does not restrict the Docker API.
+
 ## Storage
 
 | Volume | Mount | Holds |

webtop/compose.yml

@@ -8,11 +8,15 @@ services:
       - PASSWORD=${PASSWORD:?required}
       - PUID=1000
       - PGID=1000
+      - 'DOCKER_MODS=linuxserver/mods:universal-package-install|linuxserver/mods:universal-docker|linuxserver/mods:code-server-golang|linuxserver/mods:code-server-nodejs|linuxserver/mods:code-server-npmglobal|linuxserver/mods:code-server-python3|linuxserver/mods:code-server-zsh'
+      - INSTALL_PACKAGES=bubblewrap|gh|git|glab|unzip|zip
+      - NODEJS_MOD_VERSION=24
       - TZ=${TZ:-Asia/Ho_Chi_Minh}
       # - TITLE=${TITLE:-Webtop}
     volumes:
       - webtop-config:/config
       - webtop-workspace:/workspace
+      - /var/run/docker.sock:/var/run/docker.sock:ro
 
 volumes:
   webtop-config: