Add build script

build_agent.cmd

@@ -0,0 +1,52 @@
+@echo off
+cd /D "%~dp0"
+echo This script downloads the Beszel repository and builds the Beszel agent for Windows (64 Bit only).
+echo If not yet installed, Git and Go will be installed via Winget.
+echo.
+
+where winget.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Winget not found, install Winget or use a compatible OS: Win 10 Client OS or later
+	goto end
+) else (
+	echo Winget executable found
+)
+
+where go.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Installing Go with Winget
+	winget install GoLang.Go >nul 2>&1
+) else (
+	echo Go executable found
+)
+
+where git.exe >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Installing Git with Winget
+	winget install Git.Git >nul 2>&1
+) else (
+	echo Git executable found
+)
+
+echo Cloning Beszel repository
+git clone https://github.com/henrygd/beszel.git >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Cloning the Beszel repository failed.
+	goto end
+)
+
+cd .\beszel\beszel\cmd\agent
+
+echo Building agent
+set GOOS=windows
+set GOARCH=amd64
+set CGO_ENABLED=0
+go build -ldflags "-w -s" . >nul 2>&1
+if %errorlevel% NEQ 0 (
+	echo Something went wrong
+) else (
+	echo Build successful:
+	dir agent.exe
+)
+
+:end

install-beszel-service.cmd

@@ -11,7 +11,7 @@ set AGENTEXE=%DESTINATIONDIR%\agent.exe
 set NSSMEXE=nssm.exe
 
 where nssm.exe >nul 2>&1
-if %errorlevel%==1 goto installnssm
+if %errorlevel% NEQ 0 goto installnssm
 goto proceed
 
 :installnssm
@@ -42,21 +42,21 @@ netsh advfirewall firewall add rule name="%SERVICENAME%" dir=in action=allow pro
 
 echo Installing service %SERVICENAME%
 %NSSMEXE% install %SERVICENAME% "%AGENTEXE%" >nul 2>&1
-if %errorlevel%==1 (
+if %errorlevel% NEQ 0 (
 	echo Failed to install the service.
 	goto end
 )
 
 echo Setting environment for %SERVICENAME%
 %NSSMEXE% set %SERVICENAME% AppEnvironmentExtra "KEY=%BESZELKEYPREFIX% %BESZELKEY%" >nul 2>&1
-if %errorlevel%==1 (
+if %errorlevel% NEQ 0 (
 	echo Failed to set the service environment.
 	goto end
 )
 
 echo Starting %SERVICENAME%
 %NSSMEXE% start %SERVICENAME% >nul 2>&1
-if %errorlevel%==1 (
+if %errorlevel% NEQ 0 (
 	echo Failed to start service.
 	goto end
 )