added container hostname

docker-compose.yml

@@ -3,6 +3,7 @@ services:
 #########################
    zabbix:
       image: git.shihaam.dev/dockerfiles/zabbix-server
+      hostname: zabbix
       volumes:
          - $PWD/configdir/etc/zabbix/zabbix_server.conf:/etc/zabbix/zabbix_server.conf
          - $PWD/configdir/etc/zabbix/nginx.conf:/etc/zabbix/nginx.conf
@@ -17,6 +18,7 @@ services:
 #########################
    db:
       image: mysql:8
+      hostname: db
       environment:
         MYSQL_DATABASE: zabbix
         MYSQL_USER: zabbix