Connect WebSocket using a ktor, and cover regenrate session case. 웹소켓(WebSocket)을 Ktor를 사용하여 연결, 그리고 세션 재생성 경우 다룸. Linkedin: https://www.linkedin.com/posts/jaehwa-noh_github-jaehwa-nohwebsocket-test-connect-activity-7329733088949784576-dCXw?utm_source=share&utm_medium=member_desktop&rcm=ACoAADl2QJ0Bukw7tKScLpkmCtWdcYbgz1u8lDg