feat: add GitHub logo link to global header #121

	# GitHub Pages デプロイ用ワークフロー
	name: Deploy to GitHub Pages

	on:
	push:
	branches: ['**'] # 全ブランチでビルド可能
	workflow_dispatch:

	permissions:
	contents: read
	pages: write
	id-token: write

	concurrency:
	group: "pages"
	cancel-in-progress: false

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: recursive

	- name: Setup Node.js
	uses: actions/setup-node@v4
	with:
	node-version: '20'
	cache: 'npm'

	- name: Install dependencies
	run: npm ci

	- name: Build Astro site
	run: npm run build

	- name: Upload artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: ./dist

	deploy:
	# mainブランチのみデプロイを実行
	if: github.ref == 'refs/heads/main'
	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}
	runs-on: ubuntu-latest
	needs: build
	steps:
	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4

Provide feedback