Update .dockerignore and .gitignore to include 'dist' directory; add build.ps1 script for frontend packaging

Frontend/erp-system/.dockerignore

@@ -2,6 +2,7 @@ node_modules
 .next
 out
 build
+dist
 coverage
 .vercel
 

Frontend/erp-system/.gitignore

@@ -19,6 +19,7 @@
 
 # production
 /build
+/dist
 
 # misc
 .DS_Store

Frontend/erp-system/build.ps1

@@ -0,0 +1,106 @@
+<#
+.SYNOPSIS
+  Builds the ERP frontend (Next.js) and packages it into a deployable zip.
+
+.DESCRIPTION
+  1. Installs dependencies (npm ci) when node_modules is missing or -CleanInstall is set
+  2. Runs `npm run build`
+  3. Copies the runtime files into dist/ and zips them
+
+  The /api/* rewrite to the backend is resolved at BUILD time (next.config.ts ->
+  routes-manifest.json), so BACKEND_ORIGIN must be correct for the target environment
+  when you build, not when you start the server.
+
+.PARAMETER BackendOrigin
+  Origin of the ERPCore backend, e.g. http://127.0.0.1:6701. Overrides BACKEND_ORIGIN
+  from the environment / .env.local for this build only.
+
+.PARAMETER CleanInstall
+  Delete node_modules and reinstall from package-lock.json.
+
+.PARAMETER NoZip
+  Build and stage the files in dist/erp-frontend but do not create the zip.
+
+.EXAMPLE
+  .\build.ps1 -BackendOrigin http://127.0.0.1:6701
+#>
+[CmdletBinding()]
+param(
+  [string]$BackendOrigin,
+  [switch]$CleanInstall,
+  [switch]$NoZip
+)
+
+$ErrorActionPreference = "Stop"
+Set-Location $PSScriptRoot
+
+function Step($msg) { Write-Host "`n==> $msg" -ForegroundColor Cyan }
+
+function Invoke-Npm {
+  & npm @args
+  if ($LASTEXITCODE -ne 0) { throw "npm $($args -join ' ') failed (exit $LASTEXITCODE)" }
+}
+
+if (-not (Get-Command node -ErrorAction SilentlyContinue)) { throw "Node.js is not installed or not on PATH." }
+if (-not (Get-Command npm -ErrorAction SilentlyContinue)) { throw "npm is not installed or not on PATH." }
+
+$env:NEXT_TELEMETRY_DISABLED = "1"
+if ($BackendOrigin) { $env:BACKEND_ORIGIN = $BackendOrigin }
+
+# --- Install -----------------------------------------------------------------
+if ($CleanInstall -and (Test-Path node_modules)) {
+  Step "Removing node_modules"
+  Remove-Item node_modules -Recurse -Force
+}
+if (-not (Test-Path node_modules)) {
+  Step "Installing dependencies (npm ci)"
+  Invoke-Npm ci
+}
+else {
+  Write-Host "node_modules found, skipping install (use -CleanInstall to reinstall)." -ForegroundColor DarkGray
+}
+
+# --- Build -------------------------------------------------------------------
+$origin = if ($env:BACKEND_ORIGIN) { $env:BACKEND_ORIGIN } else { "(from .env.local, else http://127.0.0.1:6701)" }
+Step "Building (BACKEND_ORIGIN = $origin)"
+Invoke-Npm run build
+
+# --- Package -----------------------------------------------------------------
+Step "Packaging"
+$dist = Join-Path $PSScriptRoot "dist"
+$stage = Join-Path $dist "erp-frontend"
+if (Test-Path $stage) { Remove-Item $stage -Recurse -Force }
+New-Item -ItemType Directory -Force $stage | Out-Null
+
+# .next without the build cache and dev output (hundreds of MB, not needed at runtime)
+& robocopy ".next" (Join-Path $stage ".next") /E /NFL /NDL /NJH /NJS /NP /XD cache dev diagnostics | Out-Null
+if ($LASTEXITCODE -ge 8) { throw "robocopy .next failed (exit $LASTEXITCODE)" }
+
+& robocopy "public" (Join-Path $stage "public") /E /NFL /NDL /NJH /NJS /NP | Out-Null
+if ($LASTEXITCODE -ge 8) { throw "robocopy public failed (exit $LASTEXITCODE)" }
+
+foreach ($f in "package.json", "package-lock.json", "next.config.ts") {
+  Copy-Item $f $stage
+}
+
+if ($NoZip) {
+  Write-Host "`nStaged at: $stage" -ForegroundColor Green
+  exit 0
+}
+
+$stamp = Get-Date -Format "yyyyMMdd-HHmmss"
+$zip = Join-Path $dist "erp-frontend-$stamp.zip"
+# bsdtar (built into Windows 10+) writes forward-slash entry names. Windows PowerShell 5.1's
+# ZipFile/Compress-Archive write backslashes, which unzip on Linux as literal "a\b" filenames.
+& tar.exe -a -c -f $zip -C $stage .
+if ($LASTEXITCODE -ne 0) { throw "tar failed (exit $LASTEXITCODE)" }
+
+$sizeMb = [math]::Round((Get-Item $zip).Length / 1MB, 1)
+Write-Host "`nBuild OK: $zip ($sizeMb MB)" -ForegroundColor Green
+Write-Host @"
+
+To run on the server:
+  unzip, then in the folder:
+    npm ci --omit=dev
+    PORT=6702 npm start
+"@