HarshVaragiya / SHELLCTF0x02

SHELLCTF 0x02 Archive

SHELLCTF 0x02 Archive

Build Base Docker image

• Assuming all challenges require ubuntu 18.04 LTS docker images
• Example Dockerfile Dockerfile_Example
• Build a base docker image which has ubuntu:18.04 updated and su installed (execute from git root)

docker build -t baseimage .

• This will add a docker image "baseimage" in your docker images.. (check with 'docker image ls')

Challenge Workflow

• Create a Dockerfile for the challenge/ set of challenges.
• Add the challenges in the docker image.
• Run 1 Docker container for that image exposing and mapping the necessary ports.

Creating Challenge Dockerfile

• Build Docker Image for the set of challenges using the example dockerfile

FROM baseimage

WORKDIR <work_directory_for_challenge1>
COPY <challenge1_files/folder> <image_file/folder>
EXPOSE <port>
..

WORKDIR <work_directory_for_challenge2>
COPY <challenge2_files/folder> <image_file/folder> 
EXPOSE <port>
..


COPY startup_script.sh <script.sh>
CMD["<script.sh>"]

• Make Sure to Write a startup_script.sh that would start the challenges and specify that as CMD/ENTRYPOINT