chore(Windows): define tags in docker compose file instead of code

build.ps1

@@ -149,7 +149,7 @@ foreach($agentType in $AgentTypes) {
         yq '.services.[].build.target = \"agent\"' $originalDockerComposeFile | Out-File -FilePath $finalDockerComposeFile
     }
 
-    $builds = @{}
+    $builds = @()
 
     $compose = Invoke-Expression "$baseDockerCmd config --format=json" 2>$null | ConvertFrom-Json
     foreach ($service in $compose.services.PSObject.Properties) {