chore: update example docker-compose

Author: Julusian

packages/documentation/docs/user-guide/installation/installing-sofie-server-core.md

@@ -76,7 +76,10 @@ services:
   # spreadsheet-gateway:
   #   image: superflytv/sofie-spreadsheet-gateway:latest
   #   restart: always
-  #   command: yarn start -host core -port 3000 -id spreadsheetGateway0
+  #   environment:
+  #     DEVICE_ID: spreadsheetGateway0
+  #     CORE_HOST: core
+  #     CORE_PORT: '3000'
   #   networks:
   #     - sofie
   #   depends_on:
@@ -89,7 +92,10 @@ services:
   #     - "10540:10540" # MOS Lower port
   #     - "10541:10541" # MOS Upper port
   #     # - "10542:10542" # MOS query port - not used
-  #   command: yarn start -host core -port 3000 -id mosGateway0
+  #   environment:
+  #     DEVICE_ID: mosGateway0
+  #     CORE_HOST: core
+  #     CORE_PORT: '3000'
   #   networks:
   #     - sofie
   #   depends_on: