darknet-lantern/submissions/README.md

to enable submissions you need to do the following:

# install the php-gd dependency to enable the captcha feature
apt install php-gd -y

# copy the template submission.csv file
cp templates/submission.csv submissions/submission.csv

# chmod 777 the submission.csv file to enable php to write to it
chmod 777 -R /srv/darknet-lantern/submissions/