How to run composer as non root user on official docker php image
Incase anyone wants to achieve the same follow instructions below
I added a USER in dockerfile so that composer will be run as user deploy in future. But php-fpm needs to be run as root. So I set a setuid bit on the php-fpm binary. And now everything got resolved.
RUN chmod u+s /usr/sbin/php-fpm7USER deployENTRYPOINT ["/entrypoint.sh"]CMD ["php-fpm7","-F"]