tests: add Dockerfile for Docker images with Siege + instructions

tests/siege/Dockerfile

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+FROM ubuntu:latest
+
+# Update packages and install necessary tools
+RUN apt-get update && \
+	apt-get install -y \
+	build-essential \ 
+	# Includes g++ and make
+	git \
+	curl \
+	vim \ 
+	siege \
+	# Optional, for editing inside the container
+	&& rm -rf /var/lib/apt/lists/*
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Default command or entrypoint
+CMD ["bash"]

tests/siege/siege.md

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+# Test Webserv with Siege in a Docker Environment
+
+## 1. Build the Docker Image
+
+Use the Dockerfile in this folder. 
+
+From the **root** directory build the Docker image:
+
+```bash
+docker build -t ubuntu-siege -f tests/siege/Dockerfile .
+```
+
+## 2. Start the first interactive session 
+
+1. Run Siege interactively within the container, use:
+
+```bash
+docker run --name ubuntu-siege-session --rm -it -v "$(pwd):/app" ubuntu-siege /bin/bash
+
+```
+
+## 3. Compile the webserver 
+
+    `make re`
+
+### 4. Start a second interactive section
+
+```bash
+docker exec -it ubuntu-siege-session /bin/bash
+```
+
+### 5. Stress test the webserv
+
+
+Inside the container, you can execute commands like:
+
+```bash
+siege -c10 -d5 -t1M http://localhost:80
+```