feat(docker): enable containerization of marketplace scraper

Introduce Dockerfile with production build using Bun, .dockerignore for efficient builds, and docker-compose.yml for easy local and prod deployment on port 3000.

docker-compose.yml

@@ -0,0 +1,15 @@
+services:
+  marketplace-scraper:
+    build: .
+    ports:
+      - "4005:4005"
+    environment:
+      - NODE_ENV=production
+      - PORT=4005
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:4005/api/status"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 5s
+    restart: unless-stopped