Improve unit file and instructions

README.md

@@ -10,6 +10,7 @@ Back and forth it goes!
     git clone https://source.netsyms.com/Netsyms/matrix-bridge-voxtelesys /opt/matrix-bridge-voxtelesys
     cd /opt/matrix-bridge-voxtelesys
     npm install
+    adduser --system --no-create-home matrix-bridge-voxtelesys
     cp matrix-bridge-voxtelesys.service /etc/systemd/system
     systemctl enable matrix-bridge-voxtelesys
     systemctl start matrix-bridge-voxtelesys

matrix-bridge-voxtelesys.service

@@ -1,13 +1,14 @@
 [Unit]
 Description=matrix-bridge-voxtelesys
+After=network.target
 
 [Service]
+Type=simple
 User=matrix-bridge-voxtelesys
 Group=users
 ExecStart=/usr/bin/node /opt/matrix-bridge-voxtelesys/main.js
-ExecStop=/bin/kill -9 $MAINPID
 Restart=always
 RestartSec=15
 
 [Install]
-WantedBy=multi-user.target
+WantedBy=multi-user.target