add toc, build, quick start

README.md

@@ -3,21 +3,112 @@
 ![CI](https://github.com/AleoHQ/leo/workflows/CI/badge.svg)
 [![codecov](https://codecov.io/gh/AleoHQ/leo/branch/master/graph/badge.svg?token=S6MWO60SYL)](https://codecov.io/gh/AleoHQ/leo)
 
+Leo is a functional, statically-typed programming language built for writing private applications.
 
-# Overview
-Welcome to the Leo programming language. Leo is a functional, statically-typed programming language built for writing private applications.
+## <a name='TableofContents'></a>Table of Contents
 
-The syntax of Leo is influenced by JavaScript, Python, Scala, and Rust with a strong emphasis on readability and ease-of-use.
+* [1. Overview](#1-overview)
+* [2. Build Guide](#2-build-guide)
+    * [2.1 Install Rust](#21-install-rust)
+    * [2.2a Build from Crates.io](#22a-build-from-cratesio)
+    * [2.2b Build from Source Code](#22b-build-from-source-code)
+* [3. Quick Start](#3-quick-start)
+    * [3.1 Zero Knowledge in One Line](#31-zero-knowledge-in-one-line)
+* [4. Flying Tour](#4-flying-tour)
+* [5. License](#5-license)
+
+
+## 1. Overview
+Welcome to the Leo programming language.
 
 Leo exists to provide a simple high-level language that compiles to a rank one constraint system (R1CS) circuit. With Leo, you can write circuits to support zero-knowledge tokens, private stable coins, and decentralized marketplaces.
 
-# Download
-Download the binary for your operating system [here](https://github.com/AleoHQ/leo/releases/tag/v0.1.9)
+The syntax of Leo is influenced by JavaScript, Python, Scala, and Rust with a strong emphasis on readability and ease-of-use.
 
-# Build
+# 2. Build Guide
+
+### 2.1 Install Rust
+
+We recommend installing Rust using [rustup](https://www.rustup.rs/). You can install `rustup` as follows:
+
+- macOS or Linux:
+  ```bash
+  curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+  ```
+
+- Windows (64-bit):  
+  
+  Download the [Windows 64-bit executable](https://win.rustup.rs/x86_64) and follow the on-screen instructions.
+
+- Windows (32-bit):  
+  
+  Download the [Windows 32-bit executable](https://win.rustup.rs/i686) and follow the on-screen instructions.
+
+### 2.2a Build from Crates.io
+
+We recommend installing Leo this way. In your terminal, run:
+
+```bash
+cargo install leo
+```
+
+Now to use Leo, in your terminal, run:
+```bash
+leo
+```
+ 
+### 2.2b Build from Source Code
+
+Alternatively, you can install snarkOS by building from the source code as follows:
+
+```bash
+# Download the source code
+git clone https://github.com/AleoHQ/leo
+cd leo
+
+# Build in release mode
+$ cargo build --release
+```
+
+This will generate an executable under the `./target/release` directory. To run snarkOS, run the following command:
+```bash
+./target/release/leo
+```
+
+# 3. Quick Start
+
+Use the Leo CLI to create a new project
+
+```bash
+leo new hello_world
+cd hello_world
+```
+
+This creates a directory with the following structure:
+```bash
+hello_world/
+├── Leo.toml # Your program manifest
+├── inputs/ 
+│ └── hello_world.in # Your program inputs
+└── src/    
+  └── main.leo # Your program file
+```
+
+Let's run the project.
+
+## 3.1 Zero Knowledge in one line
+
+```bash
+leo run
+```
+This command will compile the program, generate keys for a trusted setup, fetch inputs, generate a proof and verify it.
+
+Congratulations! You've just run your first Leo program.
+
+
+# 4. Flying Tour
 
 WIP
 
-# Quick Start
-
-WIP
+# 5. License 
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](./LICENSE.md)