Writeup from author with sourcode and docker scripts included

[https://github.com/0x4d5a-ctf/Writeups/tree/master/2019/Camp2019/core-pwn/documentation](https://github.com/0x4d5a-ctf/Writeups/tree/master/2019/Camp2019/core-pwn/documentation)

Original writeup (https://github.com/0x4d5a-ctf/Writeups/tree/master/2019/Camp2019/core-pwn/documentation).