여기서 실패한 것 같습니다:
fatal: unable to access 'https://github.com/discourse/discourse.git/': gnutls_handshake() failed: Error in the pull function.
이 링크가 도움이 될 수 있습니다: Fresh install failing - gnutls_handshake() failed: Error in the pull function - #12 by Sisko