Welcome to Signal Conversation Archive Backup (SCAB)!
Full writeup is at: https://matt.sh/signal-backup
To backup your Signal Desktop database, run the following commands to:
git clone https://github.com/mattsta/signal-backup
pip3 install -r requirements.txt
cd signal-backup
rsync -avz "/Users/$(whoami)/Library/Application Support/Signal" Signal-Archive
cd Signal-Archive
python3 ../scab.py
open myConversations.html