feat(paseo): add Go, Python, shell tooling, hostname and timezone

Go 1.26.8 from the official tarball and Python 3.12 via uv, since Debian
12 carries 1.19 and 3.11. Both land outside $HOME, which the paseo-home
volume would otherwise mask.

Hostname and timezone come from the environment rather than being fixed in
the compose file. Paseo uses the container hostname as the host label in
its web UI, so without one the UI shows a random container ID.

CLAUDE.md

@@ -11,6 +11,18 @@ shorter one. Existing services that still use `docker-compose.yml` stay as
 they are; do not rename them, not even while touching the file for something
 else.
 
+## Installing software in an image
+
+Follow the upstream project's own documented install method, or the one the
+community has settled on. In order of preference: the vendor's signed package
+repository, the vendor's official tarball or install script, then a well-known
+community installer. Do not hand-roll a download, and do not take a stale
+distro package just because `apt install` is shorter — check what version it
+actually gives you first.
+
+State the reason in a comment when the obvious route is the wrong one, so the
+next person does not "simplify" it back.
+
 The root `README.md` is an index only — it covers the shared conventions and
 links out to each service. Per-service detail (variables, ports, storage)
 belongs in that service's README, not the root one. Adding a service means

paseo/.env.example

@@ -16,3 +16,10 @@ PASEO_HOSTNAMES=
 # ws://...:6767 from an HTTPS page -- which the browser blocks.
 # `uniquelocal` covers the private ranges Docker bridge networks use.
 PASEO_TRUSTED_PROXIES=uniquelocal
+
+# Container hostname. Paseo shows it as the host label in the web UI, so
+# without it you get a random container ID.
+PASEO_LABEL=paseo
+
+# Timezone for logs and agent shells.
+TZ=Asia/Ho_Chi_Minh

paseo/Dockerfile

@@ -1,18 +1,20 @@
-# The official image ships no agent CLIs. Add Claude Code globally under
-# /usr/local, where the unprivileged paseo user can run it.
-#
-# npm here delivers the same native binary as the standalone installer -- it is
-# not a Node wrapper. Do not swap this for the `curl | bash` installer: that
-# writes to $HOME/.local, and $HOME is /home/paseo, a volume mount that masks
-# anything baked in at build time.
+# The official image ships no agent CLIs or language toolchains. Add them here.
 #
 # Stays root: the entrypoint needs root to chown the mounted volumes, then
-# drops to paseo with gosu itself.
+# drops to paseo with gosu itself. Nothing installs into $HOME -- that is
+# /home/paseo, a volume mount that masks anything baked in at build time.
 FROM ghcr.io/getpaseo/paseo:latest
 
+ARG GO_VERSION=1.26.8
+ARG PYTHON_VERSION=3.12
+
+# npm here delivers the same native binary as Anthropic's standalone installer;
+# it is not a Node wrapper. Do not swap it for the `curl | bash` installer,
+# which writes to $HOME/.local.
 RUN npm install -g @anthropic-ai/claude-code
 
-# gh is not in the Debian repos, so pull it from GitHub's own signed one.
+# Everyday shell tooling, plus gh from GitHub's own signed repo since Debian
+# does not package it.
 RUN install -d -m 0755 /etc/apt/keyrings \
  && curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg \
       -o /etc/apt/keyrings/githubcli-archive-keyring.gpg \
@@ -20,5 +22,21 @@ RUN install -d -m 0755 /etc/apt/keyrings \
  && echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" \
       > /etc/apt/sources.list.d/github-cli.list \
  && apt-get update \
- && apt-get install -y --no-install-recommends gh \
+ && apt-get install -y --no-install-recommends \
+      gh less jq unzip zip lsof psmisc ugrep bfs zsh \
  && rm -rf /var/lib/apt/lists/*
+
+# Python via uv (astral.sh/uv), which fetches a standalone CPython build.
+# Debian 12 only carries 3.11, and both dirs are kept outside $HOME.
+ENV UV_INSTALL_DIR=/usr/local/bin \
+    UV_PYTHON_INSTALL_DIR=/opt/python \
+    UV_PYTHON_BIN_DIR=/usr/local/bin
+RUN curl -fsSL https://astral.sh/uv/install.sh | sh \
+ && uv python install "${PYTHON_VERSION}" --default
+
+# Go from the official tarball. Debian 12 carries 1.19, far too old.
+ENV PATH=/usr/local/go/bin:$PATH
+RUN curl -fsSL "https://go.dev/dl/go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz" \
+      -o /tmp/go.tar.gz \
+ && tar -C /usr/local -xzf /tmp/go.tar.gz \
+ && rm /tmp/go.tar.gz

paseo/README.md

@@ -1,12 +1,13 @@
 # paseo
 
 [Paseo](https://paseo.sh) — self-hosted daemon and web UI for running coding
-agents. Built from a local `Dockerfile` that adds Claude Code and `gh` to the
-[official image](https://paseo.sh/docs/docker), which ships neither.
+agents. Built from a local `Dockerfile` that adds Claude Code, `gh`, Go,
+Python, and shell tooling to the [official image](https://paseo.sh/docs/docker),
+which ships none of it.
 
 ## Setup
 
-1. Set the three variables from `.env.example` in Coolify or Dokploy.
+1. Set the variables from `.env.example` in Coolify or Dokploy.
 2. Point the domain at port `6767` and deploy.
 3. Open the domain. At the pairing screen enter the host **with the port**:
 
@@ -33,6 +34,8 @@ the old entry is cached in `localStorage`.
 | `PASEO_PASSWORD` | Web UI and API login. Generate with `openssl rand -base64 24`. |
 | `PASEO_HOSTNAMES` | Domains allowed to reach the daemon, comma-separated. Your domain must be listed. |
 | `PASEO_TRUSTED_PROXIES` | Set to `uniquelocal`, or the UI loads but never connects. |
+| `PASEO_LABEL` | Container hostname. Paseo shows it as the host label in the UI; without it you get a random container ID. |
+| `TZ` | Timezone for logs and agent shells. |
 
 `PASEO_TRUSTED_PROXIES` matches the *source IP* of the proxy, so hostnames are
 rejected. By default the daemon believes `X-Forwarded-Proto` only from
@@ -60,14 +63,22 @@ a redeploy.
 
 ## Image
 
-Claude Code comes from npm; `gh` from GitHub's signed apt repo, since Debian
-does not package it. Add other agent providers to the `npm install` line:
+| Tool | Source | Why not apt |
+| --- | --- | --- |
+| Claude Code | npm | — |
+| `gh` | GitHub's signed apt repo | Debian does not package it |
+| Go (`GO_VERSION`) | Official go.dev tarball | Debian 12 ships 1.19 |
+| Python (`PYTHON_VERSION`) | `uv python install` | Debian 12 ships 3.11 |
+| `less jq unzip zip lsof psmisc ugrep bfs zsh` | apt | — |
+
+Bump a language with a build arg, e.g. `--build-arg GO_VERSION=1.27.1`. Add
+other agent providers to the `npm install` line:
 
 ```dockerfile
 RUN npm install -g @anthropic-ai/claude-code @openai/codex opencode-ai
 ```
 
-Notes for anyone tempted to change it:
+`uv` itself is installed too. Notes for anyone tempted to change things:
 
 - npm installs the same native binary as Anthropic's standalone installer.
   Don't swap in `curl | bash` — it writes to `$HOME/.local`, and `$HOME` is
@@ -76,3 +87,6 @@ Notes for anyone tempted to change it:
   a notice at startup. Rebuild to update.
 - The image stays root on purpose: the entrypoint chowns the volumes, then
   drops to the `paseo` user (uid 1000) with `gosu`.
+- Nothing installs into `$HOME`. That is `/home/paseo`, a volume mount that
+  hides anything baked in at build time — hence `/opt/python` and
+  `/usr/local/go` rather than the defaults.

paseo/compose.yml

@@ -1,7 +1,9 @@
 services:
   paseo:
     build: .
+    hostname: ${PASEO_LABEL}
     environment:
+      - TZ=${TZ}
       - PASEO_PASSWORD=${PASEO_PASSWORD}
       - PASEO_HOSTNAMES=${PASEO_HOSTNAMES}
       - PASEO_TRUSTED_PROXIES=${PASEO_TRUSTED_PROXIES}