feat: update readme add example

README.md

@@ -1,5 +1,5 @@
 <div align="center">
-  <img src="https://git.max-richter.dev/attachments/91cbb502-e4e1-4861-ad56-efc8f1d11e0a" width="30%"/>
+  <img src="https://git.max-richter.dev/attachments/386c10bb-155f-4732-8db8-cca8319f93f0" width="30%"/>
   <h2 align="center">LocalCerts</h2>
   <p align="center">
     Automatic HTTPS and local domain routing for Docker Compose services using <a href="https://github.com/traefik/traefik">Traefik</a>, <a href="https://github.com/mageddo/dns-proxy-server">DPS</a> and <a href="https://github.com/smallstep/certificates">Step-CA</a>.

compose.override.example.yml

@@ -0,0 +1,6 @@
+services:
+  dns:
+    volumes:
+      - /etc:/host/etc
+    environment:
+      MG_RESOLVCONF: /host/etc/resolv.conf