Syncthing - Debian-based Packages

Add the release PGP keys:

sudo mkdir -p /etc/apt/keyrings
sudo curl -L -o /etc/apt/keyrings/syncthing-archive-keyring.gpg https://syncthing.net/release-key.gpg

Add the “stable” channel to your APT sources:

echo "deb [signed-by=/etc/apt/keyrings/syncthing-archive-keyring.gpg] https://apt.syncthing.net/ syncthing stable" | sudo tee /etc/apt/sources.list.d/syncthing.list

Update and install syncthing:

sudo apt-get update
sudo apt-get install syncthing

Then configure Syncthing - As a Service (systemd)