feat(docker): multi-stage Dockerfiles with npmmirror registry

Rewrites dashboard and finder Dockerfiles to use a clean multi-stage
build (deps → builder → runner) that installs npm packages inside
Alpine Linux, avoiding the SWC musl binary issue when building from
Windows host. Uses registry.npmmirror.com for reliable installs from
restricted networks (Iran).

- docker/api/Dockerfile: .NET 10 multi-stage build
- docker/web/Dockerfile: Node 20-alpine multi-stage, npmmirror
- docker/finder/Dockerfile: Node 20-alpine multi-stage, npmmirror
- docker/website/Dockerfile: marketing website build
- scripts/: PowerShell helper scripts for local dev

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

scripts/run-local-dev.ps1

@@ -0,0 +1,19 @@
+# Start Postgres + Redis in Docker, API + Dashboard on the host (no MCR image pull).
+# Use when: docker build fails on mcr.microsoft.com / dotnet base images.
+
+$ErrorActionPreference = "Stop"
+$Root = Split-Path -Parent $PSScriptRoot
+
+Write-Host "Starting Postgres + Redis..." -ForegroundColor Cyan
+Push-Location $Root
+docker compose up -d postgres redis
+if ($LASTEXITCODE -ne 0) { Pop-Location; exit $LASTEXITCODE }
+Pop-Location
+
+Write-Host ""
+Write-Host "Infra ready. In two terminals run:" -ForegroundColor Green
+Write-Host "  API:       cd src/Meezi.API; `$env:RUN_MIGRATIONS='true'; dotnet run"
+Write-Host "  Dashboard: cd web/dashboard; npm run dev"
+Write-Host ""
+Write-Host "  Login: http://localhost:3101/fa/login  (demo OTP: 09121234567)"
+Write-Host "  API:   http://localhost:5080/swagger"