Update README with Helios features and purpose

README.md

@@ -1,9 +1,24 @@
-# Helios
+<h1 align="center"><img src="./docs/images/banner.png" alt="Helios - Identity-aware Proxy"></h1>
 
 Helios is an Identity & Access Proxy (IAP) that authorizes HTTP requests based on sets of rules. 
-It is the building block towards [BeyondCorp](https://beyondcorp.com), a model designed by Google to secure applications in Zero-Trust networks. 
-An Identity & Access Proxy is typically deployed in front of (think API Gateway) web-facing applications
-and is capable of authenticating and optionally authorizing access requests.
+It is the building block towards [BeyondCorp](https://beyondcorp.com), a model designed by Google to secure applications
+in Zero-Trust networks.
+
+My goal is to build an open source alternative to
+[Cloudflare Access](https://www.cloudflare.com/products/cloudflare-access/)
+and [Cloud IAP](https://cloud.google.com/iap/).
+
+In a nutshell, with Helios you can:
+
+* Identify users using existing identity providers like Google, Auth0, Okta and more
+* Secure and authenticate access to any domain or path 
+* Configure authorization policies using [CEL](https://github.com/google/cel-spec) expressions
+* Use Helios as gateway or reverse proxy 
+
+**Another Go proxy?**
+
+This is a project I started off for 2 reasons: I wanted to exercise and continue improving my Go skills, and because
+I'm very interested in BeyondCorp model. This is a side project of mine but I'm determined to reach a stable version.
 
 ## Development
 
@@ -26,7 +41,7 @@ Create a certificate for local development
 mkcert localhost 127.0.0.1
 ```
 
-### Developing
+### Usage
 
 Install dependencies