version is obsolete now

docs/src/guide/index.md

@@ -62,7 +62,6 @@ I won't go in to too much detail here but here are the basics for someone new to
 2. Create a docker-compose.yml file similar to this:
 
 ```yml
-version: '3.8'
 services:
   app:
     image: 'jc21/nginx-proxy-manager:latest'