make sure exposed port is accessible by localhost only

docker/tests/php/docker-compose.yml

@@ -3,11 +3,11 @@ services:
   php-apache:
     image: php:7.4-apache
     ports:
-      - "8090:80"
+      - "127.0.0.1:8090:80"
     volumes:
       - "./DocRoot:/var/www/html"
     links:
-      - 'mariadb'
+      - "mariadb"
 
   mariadb:
     image: mariadb:10.1