TeamSpeak3 autostart + frontend (webadmin)

Hello im back with minor update:

I have made it working, by adding new file "teamspeak3.service" into directory "/lib/systemd/system":

[Unit]
Description=Teamspeak 3
After=apache2.service

[Service]
WorkingDirectory=/apps/teamspeak3
ExecStart=/apps/teamspeak3/ts3server_startscript.sh start
Type=forking
KillMode=process
Restart=on-failure

[Install]
WantedBy=multi-user.target 

Altought i dont understand few parameters like "After', "Type" and "Restart", i copied them from Apache2 service and it works perfect.

Along with config.xml contained in "/apps/teamspeak3":

<Application resource-id="teamspeak3"><!-- 'resource-id' must be AppName -->
  <Category>APP_CAT_MEDIA</Category>
  <Name>TeamSpeak 3</Name><!-- Any desciptive name, upto 48 chars -->
  <Author>TeamSpeak Systems</Author><!-- Authers name. upto 48 chars -->
  <Version>1.0.0</Version><!-- Version -->
  <MinFirmwareVer>6.1.3</MinFirmwareVer>
  <RequireReboot>0</RequireReboot><!-- If non-zero, it indicate reboot is required. -->
  <LaunchURL>http://localhost/</LaunchURL><!-- 'localhost' will be replaced by framework JS. -->
  <ConfigURL></ConfigURL>
  <ReservePort>9987</ReservePort>
  <DebianPackage>teamspeak3</DebianPackage>
  <ServiceName>teamspeak3.service</ServiceName><!-- If start/stop need to start/stop service, specify service name -->
  <Description lang="en-us">TeamSpeak 3</Description>
</Application> 

NOW I CAN SWITCH APP ON AND OFF FROM THE WEBADMIN. And it works perfect. Also app autostarts with every system reboot, like i wanted.

Only minor problem is, that i dont see an application logo in webadmin, altought i have copied file "logo.png" from other application into "/apps/teamspeak3", but the picture doesnt show up in webadmin. Any tip how to fix it?