chore(devcontainer): add multi-arch dev container (x86_64/arm64) with essential tools and VS Code config

Author: Nikhil172913832

.devcontainer/.dockerignore

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+**/.git
+**/.gitignore
+**/.vscode
+**/.idea
+**/.DS_Store
+**/.pytest_cache
+**/.mypy_cache
+**/.ruff_cache
+**/__pycache__
+**/*.pyc
+**/*.pyo
+**/*.pyd
+**/.Python
+**/pip-log.txt
+**/pip-delete-this-directory.txt
+**/.venv
+**/venv
+**/ENV
+**/env
+**/.coverage
+**/.coverage.*
+**/htmlcov
+**/coverage.xml
+**/*.cover
+**/*.log
+**/.hypothesis
+**/dist
+**/build
+**/*.egg-info
+**/node_modules

.devcontainer/Containerfile

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+FROM python:3.13-slim
+
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends \
+        git \
+        curl \
+        wget \
+        build-essential \
+        sudo \
+        libffi-dev \
+    && groupadd --gid $USER_GID $USERNAME \
+    && useradd --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+USER $USERNAME
+
+RUN pip install --user pipx \
+    && python -m pipx ensurepath
+
+ENV PATH="/home/${USERNAME}/.local/bin:${PATH}"
+
+RUN pipx install hatch \
+    && pipx install uv
+
+WORKDIR /workspace
+
+CMD ["/bin/bash"]

.devcontainer/devcontainer.json

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+{
+  "name": "Pact Python Development",
+  "build": {
+    "dockerfile": "Containerfile",
+    "context": ".."
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-python.python",
+        "ms-python.vscode-pylance",
+        "charliermarsh.ruff"
+      ],
+      "settings": {
+        "python.defaultInterpreterPath": "/usr/local/bin/python3",
+        "python.testing.pytestEnabled": true,
+        "python.testing.pytestArgs": ["tests/"],
+        "editor.formatOnSave": true,
+        "editor.codeActionsOnSave": {
+          "source.organizeImports": "explicit"
+        },
+        "[python]": {
+          "editor.defaultFormatter": "charliermarsh.ruff"
+        }
+      }
+    }
+  },
+  "containerEnv": {
+    "PYTHONUNBUFFERED": "1"
+  },
+  "postCreateCommand": "git submodule update --init && hatch env create",
+  "remoteUser": "vscode",
+  "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached",
+  "workspaceFolder": "/workspace"
+}