install dnsutils

Author: kurowski

Dockerfile

@@ -14,6 +14,7 @@ RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
     && docker-php-ext-enable redis zip \
     && apt-get install -y mariadb-client redis-tools \
     && apt-get install -y npm libgtk2.0-0 libgtk-3-0 libgbm-dev libnotify-dev libnss3 libxss1 libasound2 libxtst6 xauth xvfb \
+    && apt-get install -y dnsutils \
     && apt-get clean -y && rm -rf /var/lib/apt/lists/*
 
 # Configure PHP, make memory_limit and upload_max_filesize match Pantheon