Add systemd service file

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

data/apertis-hawkbit-agent.service.in

+[Unit]
+Description=Apertis hawkBit agent
+
+[Service]
+ExecStart=@libexecdir@/apertis-hawkbit-agent
+NotifyAccess=main
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target

meson.build

@@ -38,5 +38,19 @@ executable('apertis-hawkbit-agent',
            install_dir: get_option('libexecdir'),
            dependencies: [ glib, gobject, gio, soup, jsonglib ])
 
+conf = configuration_data()
+conf.set('libexecdir',
+  join_paths(get_option('prefix'), get_option('libexecdir')))
+
+conf.set('bindir',
+  join_paths(get_option('prefix'), get_option('bindir')))
+
+service_aha = configure_file(input: 'data/apertis-hawkbit-agent.service.in',
+              output: 'apertis-hawkbit-agent.service',
+              configuration: conf)
+
+install_data(service_aha,
+           install_dir: systemunitdir)
+
 install_data (['data/apertis-hawkbit-agent.ini' ],
             install_dir: '/etc')