Make systemd user configurable and create log directory

RPM/pgmon.spec

@@ -26,9 +26,14 @@ make -C /src install DESTDIR=%{buildroot}
 /usr/share/man/man1/pgmon.1.gz
 /etc/pgmon/pgmon.yml
 /etc/pgmon/pgmon-metrics.yml
+/etc/pgmon/pgmon-service.conf
 /lib/systemd/system/pgmon.service
 /lib/systemd/system/pgmon@.service
 
+%post
+mkdir -p -m 0755 /var/log/pgmon
+chown root:root /var/log/pgmon
+
 %changelog
 * Wed Jan 08 2025 James Campbell <james@commandprompt.com> - 1.0-1
 - Initial RPM release.