feat: add cargo dependency tower-http

With the new Axum implementation for the API the browser does not make
request to the API becuase of the Cross-Origin Resource Sharing (CORS)
policy. By default there is no header `Access-Control-Allow-Origin` and
it does not allow the request.

You can be permissive by adding a layer to the router:

```
Router::new().nest("/v1", api_routes).layer(CorsLayer::permissive())
```

For the time being you need to change that line manually when you want
to setup a dev env with the banckend and the frontend using different
ports.

Cargo.toml

@@ -48,6 +48,7 @@ thiserror = "1.0"
 binascii = "0.1"
 axum = "0.6.18"
 hyper = "0.14.26"
+tower-http = { version = "0.4.0", features = ["cors"]}
 
 [dev-dependencies]
 rand = "0.8"