build: Install just from apt in the devcontainer

The base image resolves to Debian trixie, which packages just, so drop
the install script and version pin in favor of apt.

Author: claude

.devcontainer/Dockerfile

@@ -5,8 +5,6 @@ FROM mcr.microsoft.com/vscode/devcontainers/python:${VARIANT}
 ARG NODE_VERSION="24"
 ARG POETRY_VERSION="1.8.2"
 ARG POETRY_SRC="https://install.python-poetry.org"
-ARG JUST_VERSION="1.57.0"
-ARG JUST_SRC="https://just.systems/install.sh"
 
 # https://github.com/microsoft/vscode-dev-containers/blob/main/containers/go/.devcontainer/base.Dockerfile
 ENV USERNAME=vscode
@@ -20,16 +18,17 @@ RUN bash /tmp/library-scripts/node-debian.sh "${NVM_DIR}" "${NODE_VERSION}" "${U
  && apt-get clean -y && rm -rf /var/lib/apt/lists/* \
  && rm -rf /tmp/library-scripts
 
+RUN apt-get update -y \
+ && apt-get install -y --no-install-recommends just \
+ && apt-get clean -y && rm -rf /var/lib/apt/lists/*
+
 USER vscode
 WORKDIR /home/vscode
 
 RUN curl -fsSL -o install-poetry.py "${POETRY_SRC}" \
  && python install-poetry.py --version $POETRY_VERSION \
  && rm install-poetry.py
 
-RUN mkdir -p .local/bin \
- && curl -fsSL "${JUST_SRC}" | bash -s -- --tag "${JUST_VERSION}" --to /home/vscode/.local/bin
-
 RUN mkdir -p .config/git \
  && echo ".vscode/*" >> .config/git/ignore \
  && echo "*.code-workspace" >> .config/git/ignore \

.devcontainer/devcontainer.json

@@ -4,7 +4,6 @@
   "build": {
     "dockerfile": "Dockerfile",
     "args": {
-      "JUST_VERSION": "1.57.0",
       "NODE_VERSION": "24",
       "POETRY_VERSION": "1.8.2",
       "VARIANT": "3.12"