Add a README

README.md

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+# CS50 CLI
+
+> A Docker-based command-line environment for CS50 workflows.
+
+`cs50/cli` is a Docker image that provides a ready-to-use CS50 command-line environment on your local machine via the `cli50` tool. It lets you *mount a directory* in a Docker container running Ubuntu 22.04 so you can work on your projects without installing dependencies locally. :contentReference[oaicite:0]{index=0}
+
+---
+
+## Features
+
+- Mount any directory into a container running `cs50/cli`  
+- Fully contained Ubuntu 22.04 environment  
+- Works with Docker outside Docker (DooD)  
+- Useful for CS50 coursework development and testing  
+- Exposes ports, supports dotfile mounts, and provides versatile flags for flexibility :contentReference[oaicite:1]{index=1}
+
+---
+
+## Installation
+
+Before continuing, make sure you have installed:
+
+1. **Docker** — for container runtime  
+2. **Python ≥ 3.8** — required by `cli50`  
+3. **pip** — Python’s package manager  
+
+Install the CLI tool:
+```bash
+pip3 install cli50
+```
+To upgrade later:
+```bash
+pip3 install --upgrade cli50
+```
+After installing, you can pull and run the `cs50/cli` image via `cli50`.
+
+
+> Check the documentation for more info: https://cs50.readthedocs.io/cli50/