openshift v3 sed couldn't open temporary file

hi i tried to deploy my docker image to openshift online v3 but failed with message

sed: couldn't open temporary file /etc/php/7.0/apache2/sedJpqwn4: permission denied

my docker image contain sed script like

RUN sed -i '/<Directory \/var\/www\/>/,/<\/Directory>/ s/AllowOverride None/AllowOverride All/' /etc/apache2/apache2.conf

I'm new in openshift and docker how to solved this?