tune for new dottie image

docker/dottie

@@ -3,6 +3,7 @@
 set -e -o errexit -o nounset -o pipefail
 
 declare project_root="${PWD}"
+declare user="${PF_USER:=www-data}"
 
 if command -v git &>/dev/null; then
     project_root=$(git rev-parse --show-toplevel)
@@ -19,9 +20,9 @@ declare -a flags=(
     --rm
     --interactive
     --tty
+    --user "${user}"
     --env TERM
     --env COLORTERM
-    --volume "/tmp:/tmp"
     --volume "${project_root}:/var/www"
     --workdir /var/www
 )