Add a service installation script using NSSM

Install-UsingNSSM.ps1

+$ServiceName = "citrix_collector"
+# $ServiceName = "grafana"
+$NSSMExecutable = "C:\Tools\NSSM\nssm-2.24-101-g897c7ad\win64\nssm.exe"
+
+$PSExecutable = (Get-Command Powershell).Source
+$BaseDir = $PSScriptRoot
+
+try {
+    $Service = Get-Service -Name $ServiceName -ErrorAction Stop
+}
+catch {
+    Write-Host "Service $ServiceName not found, installing..."
+}
+
+if ($null -ne $Service) {
+    Write-Host "Service $ServiceName is already installed! Doing nothing."
+    exit
+}
+
+
+# required arguments, including the path to the script
+$Arguments = "-ExecutionPolicy Bypass -NoProfile -File `"$BaseDir\citrix_collector.ps1`""
+
+# install the service
+& $NSSMExecutable install $ServiceName $PSExecutable $Arguments
+
+# set a log file for stdout and stderr
+& $NSSMExecutable set $ServiceName AppStdout $BaseDir\citrix_collector.log
+& $NSSMExecutable set $ServiceName AppStderr $BaseDir\citrix_collector.log
+& $NSSMExecutable set $ServiceName AppTimestampLog 1