Add devcontainer config

Author: JamesHutchison

.devcontainer/Dockerfile

@@ -0,0 +1,9 @@
+FROM mcr.microsoft.com/devcontainers/python:1-3.12-bookworm
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        ca-certificates \
+        curl \
+        git \
+        gnupg \
+    && rm -rf /var/lib/apt/lists/*

.devcontainer/devcontainer.json

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+{
+  "name": "ReactPy",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
+  // "remoteUser": "vscode",
+  // "containerEnv": {
+  //   "BUN_INSTALL": "/home/vscode/.bun"
+  // },
+  // "remoteEnv": {
+  //   "BUN_INSTALL": "/home/vscode/.bun",
+  //   "PATH": "/home/vscode/.bun/bin:${containerEnv:PATH}"
+  // },
+  "postCreateCommand": "bash .devcontainer/post-create.sh",
+  "customizations": {
+    "vscode": {
+      "settings": {
+        "python.defaultInterpreterPath": "/usr/local/bin/python",
+        "python.terminal.activateEnvironment": false
+      },
+      "extensions": [
+        "ms-python.python",
+        "ms-python.vscode-pylance",
+        "charliermarsh.ruff",
+        "ms-playwright.playwright"
+      ]
+    }
+  }
+}

.devcontainer/post-create.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+export BUN_INSTALL="${BUN_INSTALL:-$HOME/.bun}"
+export PATH="$BUN_INSTALL/bin:$PATH"
+
+if [[ -f /etc/apt/sources.list.d/yarn.list ]]; then
+  echo "Refreshing Yarn APT keyring..."
+  curl -fsSL https://dl.yarnpkg.com/debian/pubkey.gpg \
+    | gpg --dearmor \
+    | sudo tee /usr/share/keyrings/yarn-archive-keyring.gpg >/dev/null
+fi
+
+if ! command -v hatch >/dev/null 2>&1; then
+  echo "Installing Hatch..."
+  python3 -m pip install --user hatch
+fi
+
+if ! command -v bun >/dev/null 2>&1; then
+  echo "Installing Bun..."
+  curl -fsSL https://bun.sh/install | bash
+fi
+
+echo "Building JavaScript packages..."
+hatch run javascript:build --dev
+
+echo "Building Python package..."
+hatch build --clean
+
+echo "Running ReactPy smoke test..."
+hatch run python - <<'PY'
+from reactpy import component, html
+
+
+@component
+def test_component():
+    return html.div([
+        html.h1("Test"),
+        html.p("ReactPy is working"),
+    ])
+
+
+vdom = test_component()
+print(type(vdom).__name__)
+PY