added workdir change to dockerfile

Dockerfile

@@ -42,5 +42,7 @@ ENV APACHE_RUN_DIR=/var/run/apache2
 ENV APACHE_RUN_USER=deploy
 ENV APACHE_RUN_GROUP=deploy
 
+WORKDIR /data
+
 # Start httpd as root, but will switch to deploy user thanks to env variable
 CMD ["httpd-foreground"]