Refine .env.example files across all stacks

- Streamline variable organization and formatting
- Reduce redundant comments and improve clarity
- Maintain all required variables for each stack

docker-compose/sablier/.env.example

@@ -1,5 +1,8 @@
 # Sablier Stack Environment Variables
-# These variables are used for Sablier lazy loading service
 
-# Base Configuration
+TZ=
+PUID=
+PGID=
+SERVER_IP=
+SERVER_HOSTNAME=
 DOMAIN=