feat(code-server): add command-line utilities to the image

Install network, DNS, search, lint, database-client and maintenance tools
from Debian so every fresh deploy has them without a setup step.

code-server/Dockerfile

@@ -8,6 +8,17 @@ RUN apt-get update \
     build-essential bubblewrap unzip zip \
   && rm -rf /var/lib/apt/lists/*
 
+# Command-line utilities: network and DNS, search and review, lint,
+# database clients, and backup and maintenance.
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+    iproute2 lsof bind9-dnsutils netcat-openbsd socat mtr-tiny whois \
+    tree fd-find fzf git-delta bat \
+    shellcheck shfmt yamllint \
+    postgresql-client sqlite3 redis-tools \
+    ncdu tmux restic rclone age hyperfine entr 7zip \
+  && rm -rf /var/lib/apt/lists/*
+
 # Workspace directory, owned by the container user.
 RUN mkdir -p /workspace && chown 1000:1000 /workspace
 

code-server/README.md

@@ -4,8 +4,8 @@
 official `codercom/code-server` image.
 
 The image ships code-server on Debian with `git`, `zsh`, `curl`, `sudo` and a
-few editors. The `Dockerfile` adds `build-essential`, `bubblewrap`, `zip` and
-`unzip`, and wraps the entrypoint so it starts in `/workspace` and `coder` can
+few editors. The `Dockerfile` adds `build-essential`, `bubblewrap`, `zip`,
+`unzip` and a set of command-line utilities, and wraps the entrypoint so it starts in `/workspace` and `coder` can
 use the Docker socket. Language toolchains and CLIs are installed into home,
 below.
 
@@ -231,6 +231,22 @@ image ships none of them. `build-essential` supplies the `gcc` and `make` that
 native builds expect: the linker `cargo` calls, node-gyp addons and Python
 sdists.
 
+The command-line utilities are Debian packages too, kept in the image as a
+baseline every fresh deploy has without a setup step:
+
+| Group | Packages |
+| --- | --- |
+| Network and DNS | `iproute2` (`ss`, `ip`), `lsof`, `bind9-dnsutils` (`dig`), `netcat-openbsd` (`nc`), `socat`, `mtr-tiny`, `whois` |
+| Search and review | `tree`, `fd-find`, `fzf`, `git-delta`, `bat` |
+| Lint | `shellcheck`, `shfmt`, `yamllint` |
+| Database clients | `postgresql-client` (`psql`), `sqlite3`, `redis-tools` (`redis-cli`) |
+| Maintenance | `ncdu`, `tmux`, `restic`, `rclone`, `age`, `hyperfine`, `entr`, `7zip` (`7z`) |
+
+Debian installs `fd` as `fdfind` and `bat` as `batcat`. They track Debian 13's
+versions, which lag upstream: `rclone` is 1.60, and `postgresql-client` is 17,
+whose `pg_dump` refuses to dump a newer server. Install a newer copy into home
+when one of these falls short.
+
 Everything else lives in home rather than the image, so the image build stays
 small and a redeploy does not reinstall or upgrade tools behind your back;
 upgrading is the same commands run again.