adding rss apps on slack

• outline

Getting latest IT news and features using RSS feed on Slack channel.

• adding RSS app on Slack channel

https://slack.com/intl/ko-kr/help/articles/218688467-Slack%EC%97%90-RSS-%ED%94%BC%EB%93%9C-%EC%B6%94%EA%B0%80

• managing feeds

# listing feeds
/feed list
# subscribe feed
/feed subscribe <feed-url>
# unsubscribe feed
/feed remove <feed-url>

• Useful feeds

OpenAI Status - Incident History URL: https://status.openai.com/history.rss
Google Search Status Dashboard Updates URL: https://status.search.google.com/en/feed.atom
MSRC Security Update Guide URL: https://api.msrc.microsoft.com/update-guide/rss
Slack System Status URL: https://status.slack.com/feed/rss
Atlassian Bitbucket Status - Incident History URL: https://bitbucket.status.atlassian.com/history.rss
Amazon Web Services 한국 블로그 URL: https://aws.amazon.com/ko/blogs/korea/feed/
AWS Partner Network (APN) Blog URL: https://aws.amazon.com/ko/blogs/apn/feed/
AWS News Blog URL: https://aws.amazon.com/ko/blogs/aws/feed/
TechBlogPosts URL: https://techblogposts.com/rss.xml
Outsider's Dev Story URL: http://feeds2.feedburner.com/rss_outsider_dev
GeekNews Blog URL: http://feeds.feedburner.com/geeknews-blog
GeekNews - 개발/기술/스타트업 뉴스 서비스 URL: http://feeds.feedburner.com/geeknews-feed
GitHub Status : https://www.githubstatus.com/history.rss
Line 기술 블로그 : https://techblog.lycorp.co.jp/ko/feed/index.xml