create and use custom user on debian install

debian/control

@@ -7,7 +7,7 @@ Build-Depends: debhelper (>= 10), dh-python, python3 (>= 3.5), dh-systemd (>= 1.
 
 Package: openwebrx
 Architecture: all
-Depends: python3 (>= 3.5), python3-pkg-resources, csdr (>= 0.14), netcat, owrx-connector (>= 0.1), ${python3:Depends}
+Depends: adduser, python3 (>= 3.5), python3-pkg-resources, csdr (>= 0.14), netcat, owrx-connector (>= 0.1), ${python3:Depends}
 Recommends: digiham (>= 0.3), dsd (>= 1.7), sox, direwolf (>= 1.4), wsjtx
 Description: multi-user web sdr
  Open source, multi-user SDR receiver with a web interface

debian/postinst

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -euxo pipefail
+
+adduser --system --group --no-create-home --home /nonexistant openwebrx

systemd/openwebrx.service

@@ -4,10 +4,10 @@ After=multi-user.target
 
 [Service]
 Type=simple
-User=root
-Group=root
+User=openwebrx
+Group=openwebrx
 ExecStart=/usr/bin/openwebrx
-Restart=on-failure
+Restart=always
 
 [Install]
 WantedBy=multi-user.target