[Unit]
Description=Boost next post in list %i.txt

[Service]
Type=simple
EnvironmentFile=/home/USERNAME/.config/systemd/user/boost_%i.env
WorkingDirectory=/home/USERNAME/.venv/mstdn_boost/
ExecStart=/home/USERNAME/.venv/mstdn_boost/bin/python3 mstdn_boost.py --file /PATH/TO/LIST/%i.txt