Install into a virtual environment

Create a python virtual environment and let tattler run into it.

# create a user for tattler and change to it
adduser tattler
sudo -s tattler

# build a python virtual environment
python3 -m venv ~tattler/venv_tattler

# load the virtual environment
. ~tattler/venv_tattler/bin/activate

# install tattler
pip install tattler

# deploy templates
mkdir ~tattler/tattler_templates

# run tattler
NOTIF_DEBUG_RECIPIENT_EMAIL=your_own_email@company.com \
    TATTLER_TEMPLATE_BASE=~tattler/tattler_templates \
    TATTLER_LISTEN_ADDRESS="127.0.0.1:11503" \
    TATTLER_MASTER_MODE="debug" \
    tattler_server

At this point, tattler will be listening on 127.0.0.1:11503 for requests to notify.