deploy: one-command scripts to build+run from deploy/.env

deploy/logs.ps1

@@ -0,0 +1,19 @@
+<#
+.SYNOPSIS
+  Tail logs for the stack (or a single service, e.g. api / frontend / postgres).
+.EXAMPLE
+  ./deploy/logs.ps1            # all services
+  ./deploy/logs.ps1 api        # just the API container
+#>
+param([string]$Service)
+
+$ErrorActionPreference = 'Stop'
+$root    = Split-Path -Parent $PSScriptRoot
+$envFile = Join-Path $PSScriptRoot '.env'
+
+$composeArgs = @('compose', '--env-file', $envFile, 'logs', '-f', '--tail', '200')
+if ($Service) { $composeArgs += $Service }
+
+Push-Location $root
+try { & docker @composeArgs }
+finally { Pop-Location }