new file: .dockerignore

new file:   .env.example
	new file:   Dockerfile
	modified:   backend/.env.example
	modified:   backend/package.json
	renamed:    backend/src/migrations/run.ts -> backend/src/scripts/run.ts
	renamed:    backend/src/migrations/seed.ts -> backend/src/scripts/seed.ts
	new file:   docker-compose.external-db.yml
	new file:   docker-compose.yml

docker-compose.external-db.yml

@@ -0,0 +1,29 @@
+# ============================================
+# KIS API Builder - External Database
+# ============================================
+# Use this when you have your own PostgreSQL
+#
+# 1. Copy .env.example to .env
+# 2. Set DB_HOST, DB_PORT, DB_NAME, DB_USER, DB_PASSWORD
+# 3. Run: docker compose -f docker-compose.external-db.yml up -d
+# ============================================
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: kis-api-builder-app
+    restart: unless-stopped
+    ports:
+      - "${APP_PORT:-3000}:3000"
+    environment:
+      NODE_ENV: production
+      PORT: 3000
+      DB_HOST: ${DB_HOST:?DB_HOST is required}
+      DB_PORT: ${DB_PORT:-5432}
+      DB_NAME: ${DB_NAME:-api_builder}
+      DB_USER: ${DB_USER:-postgres}
+      DB_PASSWORD: ${DB_PASSWORD:?DB_PASSWORD is required}
+      JWT_SECRET: ${JWT_SECRET:-change-this-secret-in-production}
+      JWT_EXPIRES_IN: ${JWT_EXPIRES_IN:-24h}