Update solar server systemd example

systemd/solar-server.service

@@ -1,13 +1,15 @@
 [Unit]
-Description=A pistache based HTTP server serving the Solar API
+Description=A .NET Core application providing the Solar REST API
 Requires=network.target
 After=network.target
 
 [Service]
 Type=simple
-ExecStart=/usr/local/bin/solar-server -p 3001 --connection-string /mnt/data0/log/solarpaneloutput.db
+Environment=ASPNETCORE_URLS=http://*:3001
+ExecStart=/home/pi/.dotnet/dotnet /home/pi/bin/Solar.Api/Solar.Api.dll
 Restart=always
 RestartSec=30
+User=pi
 
 [Install]
 WantedBy=multi-user.target