Improve build script error detection and remove redundant file (#2921)

Update the build script to check $LASTEXITCODE after each npm command, ensuring that failures during installation, linting, or building are correctly reported. Additionally, remove the unused build.ps1 script in the ServicePulse directory.

Author: johnsimons

src/ServicePulse.Host/build.ps1

@@ -7,22 +7,21 @@ if (Test-Path $AppOutputFolder) {
 }
 
 New-Item -ItemType Directory -Force -Path $AppOutputFolder
-
 Push-Location $FrontendSourceFolder
-npm audit --audit-level=low --omit=dev
 
-if ( $? -eq $false ) {
-    exit $LastExitCode
-}
+npm audit --audit-level=low --omit=dev
+if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
 
 npm install
+if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+
 npm run lint
+if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+
 npm run build
+if ($LASTEXITCODE -ne 0) { exit $LASTEXITCODE }
+
 Remove-Item -Path "./dist/mockServiceWorker.js" -ErrorAction SilentlyContinue
 Pop-Location
 
 Copy-Item -path $FrontendSourceFolder/dist/* -Destination $AppOutputFolder -Recurse
-
-if ( $? -eq $false ) {
-    exit $LastExitCode
-}