feat: Add Dockerization support

docker-compose.yml

@@ -0,0 +1,11 @@
+services:
+  dhl:
+    build: .
+    image: dhl:latest
+    container_name: dhl
+    ports:
+      - "3000:3000"
+    volumes:
+      # Mount a local folder to /app to manage config.json and response files
+      - ./mock-data:/app
+    restart: unless-stopped