Add Documentation links for systemd use. (#232)

log2ram-daily.service

@@ -1,6 +1,7 @@
 [Unit]
 Description=Daily Log2Ram writing activities
 After=log2ram.service
+Documentation=https://github.com/azlux/log2ram
 
 [Service]
 ExecStart=/bin/systemctl reload log2ram.service

log2ram.service

@@ -6,6 +6,7 @@ After=local-fs.target
 Conflicts=shutdown.target reboot.target halt.target
 RequiresMountsFor=/var/log /var/hdd.log
 IgnoreOnIsolate=yes
+Documentation=https://github.com/azlux/log2ram
 
 [Service]
 Type=oneshot