chore(docker): allow composer to run as root

Author: tuxpiper

Dockerfile

@@ -1,6 +1,9 @@
 FROM ushahidi/php-fpm-nginx:php-7.4
 LABEL org.opencontainers.image.source="https://github.com/ushahidi/platform"
 
+# TODO: non-root user container setup
+ENV COMPOSER_ALLOW_SUPERUSER=1
+
 COPY docker-php-ext-enable /usr/local/bin/
 RUN apt-get update 
 RUN apt-get install -y php-pear php${PHP_MAJOR_VERSION}-dev