docs: update readme

README.md

@@ -12,6 +12,13 @@
   <img src="https://img.shields.io/badge/platform-linux%20%7c%20macos%20%7c%20windows-informational">
 </p>
 
+<p align="center">
+  <b>
+  Make your own photo mosaics <a href="https://loiccoyle.com/phomo-rs">here</a>
+  </b>
+</p>
+
+
 This repo contains two crates:
 
 - `phomo` crate contains the photo mosaic generation library.
@@ -20,3 +27,48 @@ This repo contains two crates:
 And one `npm` package:
 
 - `phomo-wasm` provides the `wasm` bindings and allows `phomo` to be used in the browser.
+
+## 📦 Installation
+
+## Command line
+
+To use the `phomo` binary to build photo mosaics, install the `phomo-cli` crate:
+
+```sh
+cargo install phomo-cli
+```
+
+### Usage
+
+Once installed, you can use the `phomo` binary.
+
+Something like:
+
+```sh
+phomo master_image.png tile_directory/ output_mosaic.png
+```
+
+If doubt see the help:
+
+<!-- help start -->
+<!-- help end -->
+
+## Library
+
+To use the library as a dependency in your projects, add the `phomo` crate:
+
+```sh
+cargo add phomo
+```
+
+See the [docs](https://docs.rs/phomo) for usage.
+
+## Wasm
+
+ To use the `wasm` bindings in your project, add the `phomo-wasm` `npm` package:
+
+ ```sh
+npm add phomo-wasm
+```
+
+I would recommend taking a look at the [demo page's source code](https://github.com/loiccoyle/phomo-rs/tree/gh-pages).