Merge pull request #11 from Jsumin07/feat/baekjoon #3

	name: Notify Slack on Push to main

	on:
	push:
	branches: [main]

	jobs:
	notify:
	runs-on: ubuntu-latest
	env:
	TZ: Asia/Seoul
	steps:
	- name: Get KST time
	run: echo "KST_NOW=$(date '+%Y-%m-%d %H:%M KST')" >> $GITHUB_ENV

	- name: Build message
	id: msg
	uses: actions/github-script@v7
	with:
	script: \|
	const commits = context.payload.commits \|\| [];
	// 해시 빼고 메시지 + 작성자만 출력
	const lines = commits
	.slice(0, 10)
	.map(c => `• ${c.message.split('\n')[0]} — ${c.author?.username \|\| c.author?.name}`);
	core.setOutput('summary', lines.join('\n') \|\| '—');

	- name: Post to Slack
	uses: slackapi/[email protected]
	with:
	payload: \|
	{
	"text": ":rocket: main에 변경사항 푸시됨",
	"blocks": [
	{ "type": "header", "text": { "type": "plain_text", "text": "📌 main 브랜치 업데이트" } },
	{ "type": "section", "text": { "type": "mrkdwn", "text": "리포지토리: <${{ github.server_url }}/${{ github.repository }}\|${{ github.repository }}>\n푸시한 유저: ${{ github.actor }}\n시간(KST): ${{ env.KST_NOW }}" } },
	{ "type": "section", "text": { "type": "mrkdwn", "text": "커밋 요약:\n${{ steps.msg.outputs.summary }}" } },
	{ "type": "divider" },
	{ "type": "section",
	"text": { "type": "mrkdwn", "text": ":bell: 로컬/포크 최신화\n```bash\ngit checkout main\ngit pull --rebase origin main\n# (포크)\ngit fetch upstream\ngit rebase upstream/main\n```" }
	}
	]
	}
	env:
	SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
	SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK

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