Update README with screenshots and sections

In this commit, the README file has been updated to include screenshots of the Nauthilus project. Additions include sections on the "Screenshots" and "Official Website." Furthermore, some outdated development and docker build badges have been removed.

Signed-off-by: Christian Roessner <c@roessner.co>

README.md

@@ -1,13 +1,24 @@
-[![Development Build](https://github.com/croessner/nauthilus/actions/workflows/build-features.yaml/badge.svg?branch=features)](https://github.com/croessner/nauthilus/actions/workflows/build-features.yaml)
-[![Development Docker Build](https://github.com/croessner/nauthilus/actions/workflows/docker-features.yaml/badge.svg?branch=features)](https://github.com/croessner/nauthilus/actions/workflows/docker-features.yaml)
 [![Release Build](https://github.com/croessner/nauthilus/actions/workflows/build-stable.yaml/badge.svg)](https://github.com/croessner/nauthilus/actions/workflows/build-stable.yaml)
-[![Production Docker Build](https://github.com/croessner/nauthilus/actions/workflows/docker-stable.yaml/badge.svg)](https://github.com/croessner/nauthilus/actions/workflows/docker-stable.yaml)
+
 # Nauthilus
 
 Nauthilus is a general purpose authentication service written in Go. It is designed to work as a central place where all kinds of 
 authentication requests are handled. No matter if you need to authenticate users from a mail server or a web page. 
 Services are connected to Nauthilus.
 
+## Screenshots
+
+This is an example of Nauthilus, how it is integrated in Dovecot and Roundcube.
+
+### Login screen
+![](img/Login.png)
+
+### Entering TOTP code
+
+![](img/2FA.png)
+
+## Official website
+
 The documentation is found on [https://nauthilus.org](https://nauthilus.org).
 
 The documentation itself is another project at [https://github.com/croessner/nauthilus-website](https://github.com/croessner/nauthilus-website).