feat: add complete Docker setup for testing

- Update docker-compose.yml with frontend service and healthchecks

- Add frontend Dockerfile with dev and production stages

- Add nginx.conf for production frontend serving

- Add docker-compose.prod.yml for production deployment

- Add .env.example with all configuration options

- Add init scripts (init.sh, init.ps1) for easy setup

scripts/init.ps1

@@ -0,0 +1,132 @@
+# =============================================================================
+# Aegis Initialization Script (PowerShell)
+# =============================================================================
+# This script initializes the Aegis platform after starting Docker containers.
+# 
+# Usage:
+#   .\scripts\init.ps1
+# =============================================================================
+
+$ErrorActionPreference = "Stop"
+
+Write-Host "╔═══════════════════════════════════════════════════════════════════════╗" -ForegroundColor Cyan
+Write-Host "║                    Aegis - Platform Initialization                     ║" -ForegroundColor Cyan
+Write-Host "╚═══════════════════════════════════════════════════════════════════════╝" -ForegroundColor Cyan
+Write-Host ""
+
+function Write-Status {
+    param([string]$Message)
+    Write-Host "[✓] $Message" -ForegroundColor Green
+}
+
+function Write-Warning {
+    param([string]$Message)
+    Write-Host "[!] $Message" -ForegroundColor Yellow
+}
+
+function Write-Error {
+    param([string]$Message)
+    Write-Host "[✗] $Message" -ForegroundColor Red
+}
+
+# Check if Docker is running
+try {
+    docker info | Out-Null
+} catch {
+    Write-Error "Docker is not running. Please start Docker first."
+    exit 1
+}
+
+# Check if containers are running
+$backendRunning = docker-compose ps | Select-String "aegis-backend"
+if (-not $backendRunning) {
+    Write-Warning "Containers not running. Starting them now..."
+    docker-compose up -d
+    Write-Host ""
+    Write-Host "Waiting for services to be healthy..."
+    Start-Sleep -Seconds 10
+}
+
+# Wait for backend to be ready
+Write-Host "Waiting for backend to be ready..."
+$maxRetries = 30
+$retryCount = 0
+$ready = $false
+
+while (-not $ready -and $retryCount -lt $maxRetries) {
+    try {
+        $response = Invoke-WebRequest -Uri "http://localhost:8000/health" -UseBasicParsing -TimeoutSec 2
+        if ($response.StatusCode -eq 200) {
+            $ready = $true
+        }
+    } catch {
+        $retryCount++
+        Write-Host "  Waiting... ($retryCount/$maxRetries)"
+        Start-Sleep -Seconds 2
+    }
+}
+
+if (-not $ready) {
+    Write-Error "Backend failed to start after $maxRetries attempts"
+    exit 1
+}
+Write-Status "Backend is healthy"
+
+# Run database migrations
+Write-Host ""
+Write-Host "Running database migrations..."
+docker-compose exec -T backend alembic upgrade head
+Write-Status "Migrations completed"
+
+# Seed admin user
+Write-Host ""
+Write-Host "Seeding admin user..."
+try {
+    docker-compose exec -T backend python -m app.seed 2>$null
+    Write-Status "Admin user ready"
+} catch {
+    Write-Warning "Admin user may already exist"
+}
+
+# Ask about MITRE sync
+Write-Host ""
+$runSync = Read-Host "Do you want to run initial MITRE ATT&CK sync? (y/N)"
+if ($runSync -eq "y" -or $runSync -eq "Y") {
+    Write-Host "Triggering MITRE sync (this may take a minute)..."
+    
+    try {
+        # Get admin token
+        $loginBody = "username=admin&password=admin123"
+        $loginResponse = Invoke-RestMethod -Uri "http://localhost:8000/api/v1/auth/login" `
+            -Method Post -Body $loginBody -ContentType "application/x-www-form-urlencoded"
+        
+        $token = $loginResponse.access_token
+        
+        if ($token) {
+            $headers = @{ "Authorization" = "Bearer $token" }
+            Invoke-RestMethod -Uri "http://localhost:8000/api/v1/system/sync-mitre" `
+                -Method Post -Headers $headers | Out-Null
+            Write-Status "MITRE sync triggered"
+        }
+    } catch {
+        Write-Warning "Could not authenticate. Run sync manually from the System page."
+    }
+}
+
+# Print summary
+Write-Host ""
+Write-Host "╔═══════════════════════════════════════════════════════════════════════╗" -ForegroundColor Cyan
+Write-Host "║                     Aegis is ready!                                    ║" -ForegroundColor Cyan
+Write-Host "╠═══════════════════════════════════════════════════════════════════════╣" -ForegroundColor Cyan
+Write-Host "║                                                                        ║" -ForegroundColor Cyan
+Write-Host "║  Frontend:       http://localhost:5173                                 ║" -ForegroundColor White
+Write-Host "║  Backend API:    http://localhost:8000                                 ║" -ForegroundColor White
+Write-Host "║  Swagger UI:     http://localhost:8000/docs                            ║" -ForegroundColor White
+Write-Host "║  MinIO Console:  http://localhost:9001                                 ║" -ForegroundColor White
+Write-Host "║                                                                        ║" -ForegroundColor Cyan
+Write-Host "║  Default login:  admin / admin123                                      ║" -ForegroundColor Yellow
+Write-Host "║                                                                        ║" -ForegroundColor Cyan
+Write-Host "║  ⚠️  Change the default password in production!                        ║" -ForegroundColor Yellow
+Write-Host "║                                                                        ║" -ForegroundColor Cyan
+Write-Host "╚═══════════════════════════════════════════════════════════════════════╝" -ForegroundColor Cyan
+Write-Host ""