Add a-true-connection challenge

Author: The0mikkel

challenges/misc/a-true-connection/README.md

@@ -1,4 +1,3 @@
 # A true connection
 
-*Add information about challenge here*  
-*It is meant to contain internal documentation of the challenge, such as how it is solved*
+An example challenge to demonstrate an instanced TCP challenge.

challenges/misc/a-true-connection/challenge.yml

@@ -6,7 +6,11 @@ slug: a-true-connection
 author: The Mikkel
 category: misc
 difficulty: beginner
-tags: []
+tags: [
+  Instanced,
+  TCP,
+  Example
+]
 type: instanced
 instanced_type: tcp
 instanced_name: null

challenges/misc/a-true-connection/description.md

@@ -3,4 +3,4 @@
 **Difficulty:** Beginner  
 **Author:** The Mikkel  
 
-*Add challenge description here*
+What a connection you can make, if you can connect to the endpoint below!

challenges/misc/a-true-connection/solution/README.md

@@ -1,3 +1,4 @@
 # Solution
-This directory is used to store the solution script for the challenge.
-This file should contain the steps to solve the challenge.
+
+Connect to the service using the provided connection details.  
+From here, the user has to send a message to the server, which will respond with the flag.

challenges/misc/a-true-connection/src/Dockerfile

@@ -1,8 +1,4 @@
 # Dockerfile for misc - A true connection
-FROM ubuntu:22.04
-
-RUN apt-get update && apt-get upgrade -y && apt-get install -y python3
-RUN useradd -m challengeuser
-
-USER challengeuser
+FROM istio/tcp-echo-server:1.1
 
+CMD [ "8080", "FLAG: ctfpilot{what-a-connection-you-have-made!} | Your message: " ]

challenges/misc/a-true-connection/src/docker-compose.yml

@@ -0,0 +1,5 @@
+services:
+  a-true-connection:
+    build: .
+    ports:
+      - "8080:8080/tcp"