Fix: readme

Author: S1ro1

README.md

@@ -1,3 +1,36 @@
-# Popcorn CLI (Rust Version)
+# Popcorn CLI
 
-Run `./build.sh` and then ` POPCORN_API_URL="http://127.0.0.1:8000" target/release/popcorn-cli ../../discord/discord-cluster-manager/reference-kernels/problems/pmpp/grayscale_py/submission.py`
+A command-line interface tool for submitting solutions to the [Popcorn Discord Bot](https://github.com/gpu-mode/discord-cluster-manager)
+
+## Installation
+
+### Option 1: Using pre-built binaries (Recommended)
+
+1. Download the latest release for your platform from the releases page
+2. Extract the archive
+3. Move the binary to a location in your PATH
+
+### Option 2: Building from source
+
+This app is written in Rust, so you can just install it via `cargo install`
+
+## Usage
+
+Set the `POPCORN_API_URL` environment variable to the URL of the Popcorn API. You can get this from the [GPU Mode Discord server](https://discord.gg/gpumode).
+
+Then, you need to be registered to use this app. You can register by running: `popcorn-cli register [discord|github]`. We strongly reccomend using your Discord account to register, as this will match your submissions to your Discord account.
+Once you're registered, there is a file created in your `$HOME` called `.popcorn-cli.yaml` that contains your registration token. This token is sent with each request.
+
+If you want to re-register (you can do this any number of times), you can run `popcorn-cli reregister [discord|github]`.
+
+After this, you can submit a solution by running:
+
+```bash
+popcorn-cli submit <submission-file>
+```
+
+The interactive CLI will guide you through the process of:
+1. Selecting a leaderboard
+2. Selecting GPU options
+3. Setting submission mode
+4. Submitting your work