Add a systemd service file e.g.
cat <<EOF | sudo tee /etc/systemd/system/dapperdox.service
[Unit]
Description=This is dapperdox
Wants=network-online.target
After=
[Service]
Type=forking
User=dapperdox
ExecStart=/sbin/startproc /full/path/to/dapperdox -spec-dir=examples/specifications/tc -bind-addr 129.19.20.55:4096
ExecStop=/sbin/killproc -TERM /full/path/to/dapperdox
[Install]
WantedBy=multi-user.target
EOF
Now try if you can start it.
sudo systemctl start dapperdox.service
Adjust the different things as you need them.
Afterwards you want to enable it so it starts during boot.
sudo systemctl enable dapperdox.service