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README.md

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+<div align="center">
+
+# salvo-captcha
+
+A captcha middleware for [salvo](salvo.rs) framework. It uses [`captcha`](https://github.com/daniel-e/captcha) crate to generate captcha images.
+
+[![salvo-captcha-video](https://i.suar.me/9NjJ1)](https://ibb.co/XVRVMZj)
+
+</div>
+
+### Add to your project
+First, add the following to your `Cargo.toml`:
+
+```toml
+[dependencies]
+salvo-captcha = "0.1"
+```
+
+Or use [cargo-add](https://doc.rust-lang.org/cargo/commands/cargo-add.html) to add the dependency to your `Cargo.toml`:
+
+```sh
+$ cargo add salvo-captcha
+```
+
+### Usage
+See the [examples](examples) directory for a complete example.
+
+
+### Storage
+The storage of the captcha is handled by a [`CaptchaStore`] trait. You can implement your own storage or use the `cacache-rs` by enabling the `cacache-storage` feature.
+
+```toml
+[dependencies]
+salvo-captcha = { version = "0.1", features = ["cacache-storage"] }
+```
+
+### Captcha name and difficulty
+In this table you can see the different between the difficulties and the name of the captcha.
+
+| Name | Difficulty | Image |
+|------|------------|-------|
+| `Amelia` | Easy | ![Simple](https://i.suar.me/1JaxG/s) |
+| `Amelia` | Medium | ![Simple](https://i.suar.me/l7zBl/s) |
+| `Amelia` | Hard | ![Simple](https://i.suar.me/qXAlx/s) |
+| `Lucy` | Easy | ![Simple](https://i.suar.me/edwBG/s) |
+| `Lucy` | Medium | ![Simple](https://i.suar.me/NJmg0/s) |
+| `Lucy` | Hard | ![Simple](https://i.suar.me/OJK7M/s) |
+| `Mila` | Easy | ![Simple](https://i.suar.me/dO78z/s) |
+| `Mila` | Medium | ![Simple](https://i.suar.me/PXBwK/s) |
+| `Mila` | Hard | ![Simple](https://i.suar.me/8edgE/s) |
+
+### License
+This project is licensed under the MIT license for more details see [LICENSE](LICENSE) or http://opensource.org/licenses/MIT.
+
+
+[`CaptchaStore`]: https://docs.rs/salvo_captcha/0.1.0/salvo_captcha/trait.CaptchaStore.html
+[cacache-rs]: https://github.com/zkat/cacache-rs