added restart policy in comments

docker-compose.yml

     database:
         build: ./postgresql
         container_name: zabbix-postgresql
+#        restart: unless-stopped
         networks:
             zabbix.internal.docker:
                 aliases:
     zabbix:
         build: ./zabbix
         container_name: zabbix-zabbix
+#        restart: unless-stopped
         networks:
             zabbix.internal.docker:
                 aliases:
     frontend:
         build: ./frontend
         container_name: zabbix-frontend
+#        restart: unless-stopped
         networks:
             zabbix.internal.docker:
                 aliases: