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shin4488
algorithm-visualizer
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# first up command: docker compose up --build
services:
app:
build:
context: .
dockerfile: Dockerfile
# container_name は固定しない。worktree ごとに別プロジェクトとして <project>-app-1 で作られ、名前が衝突しないようにする
# HMR を外から使えるように host/port を渡す
command:
- bash
- -lc
- |
set -euo pipefail
# node_modules がない or 空なら初回インストール
if [ ! -d node_modules ] || [ -z "$$(ls -A node_modules 2>/dev/null || true)" ]; then
echo "[compose] installing deps..."
yarn install --frozen-lockfile
fi
echo "[compose] starting dev server..."
exec yarn dev --host 0.0.0.0 --port 1234
# NODE_ENV は設定せず、Parcel の既定(dev サーバーは development、build は production)に任せる
# ここで固定すると exec で実行する yarn build にも効き、本番と異なる開発版の React が同梱される
# Docker Desktop などでファイル監視が不安定な場合は次の 2 行のコメントアウトを外す
# environment:
# - PARCEL_WATCH_INTERVAL=100
# 別の worktree の開発サーバーと同時に動かすときは DEV_PORT でホスト側のポートだけを変える
ports:
- ${DEV_PORT:-1234}:1234
# ホットリロード前提のマウント設定
volumes:
- ./:/app:delegated
# node_modules はコンテナ側のものを使いたいので匿名ボリュームで保護
- /app/node_modules
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