Expose default DOCUMENT_ROOT variable

Author: solcloud

src/docker/docker-compose.yml

@@ -37,6 +37,7 @@ services:
       - APACHE_RUN_USER=#${USER}
       - APACHE_RUN_GROUP=#${GROUP}
       - CONTAINER_NAME=${WEBSERVER_NAME}
+      - DOCUMENT_ROOT=${DOCUMENT_ROOT}
       - APACHE_LOG_LEVEL=${APACHE_LOG_LEVEL}
       - HOME=/tmp
       - XDEBUG_CONFIG="idekey=${PROJECT_NAME}"