include/default_user.bash (12 lines of code) (raw):
#!/usr/bin/env bash
addgroup --quiet --gid "32767" "herokuishuser" && \
adduser \
--shell /bin/bash \
--disabled-password \
--force-badname \
--no-create-home \
--uid "32767" \
--gid "32767" \
--gecos '' \
--quiet \
--home "/app" \
"herokuishuser"