Update README.md

Revised with references to the docker-compose.yml file in the repo.

README.md

@@ -29,31 +29,19 @@ to override with your own config file if needed (see [config file](#config-file)
 ```
 docker run -d -t -i -v $(pwd)/config.py:/opt/netbox-zabbix/config.py ... 
 ```  
-### Docker Compose Example
-For users wanting to use docker compose for running the sync the example below can be used as a starting point.
+### Running via Docker Compose
+For users wanting to use docker compose for running the sync, utilize the docker-compose.yml file in the main repo as a starting point.
 
-* Verify volume map matches your location
+* Verify volume map matches your actual location of the config file
 * Update the environment variables to match your install
   * Note: Do not wrap the vars in quotes
 
+Once the compose file has been filled out run a one-time sync with:
 ```
-# example docker compose file for netbox to zabbix sync
-#
-
-services:
-  nbx-zbx-sync:
-    container_name: netbox-zabbix-sync
-    restart: no
-    image: ghcr.io/thenetworkguy/netbox-zabbix-sync:main
-    volumes:
-      - /etc/netbox-zabbix-sync/config.py:/opt/netbox-zabbix/config.py
-    environment:
-      - ZABBIX_HOST=https://zabbix.local
-      - ZABBIX_TOKEN=<othersecrettoken>
-      - NETBOX_HOST=https://netbox.local
-      - NETBOX_TOKEN=<secrettoken>
+docker compose up
 ```
-
+The script, by design, runs on demand so it will need to be scheduled to run by the users prefered method.
+Successful completion of the script is noted by: ```exited with code 0```
 
 ## Installation from Source