Full path

src/freedombone-app-cryptpad

     echo 'User=cryptpad' >> /etc/systemd/system/cryptpad.service
     echo 'Group=cryptpad' >> /etc/systemd/system/cryptpad.service
     echo "WorkingDirectory=$CRYPTPAD_DIR" >> /etc/systemd/system/cryptpad.service
-    echo "ExecStart=/usr/local/bin/node ./server.js" >> /etc/systemd/system/cryptpad.service
+    echo "ExecStart=/usr/local/bin/node $CRYPTPAD_DIR/server.js" >> /etc/systemd/system/cryptpad.service
     echo 'Restart=on-failure' >> /etc/systemd/system/cryptpad.service
     echo '' >> /etc/systemd/system/cryptpad.service
     echo '[Install]' >> /etc/systemd/system/cryptpad.service