Merge pull request #281 from PaulWoitaschek/patch-1

Specify the full compose syntax

README.md

@@ -121,7 +121,9 @@ occurring, typical ones are file permission issues.
 
 Alternatively, for Docker Compose, you can use something like:
 
-```yaml
+```yml
+version: '3.7'
+services:
   tubesync:
     image: ghcr.io/meeb/tubesync:latest
     container_name: tubesync