feat: Add Dockerization support

README.md

@@ -99,6 +99,52 @@ cargo run
 cargo build --release
 ```
 
+### Using with Docker
+
+You can run DHL as a Docker container. The application automatically generates a default `config.json` and `response.json` if they are missing in the work directory.
+
+#### Build the Image
+
+```bash
+docker build -t dhl .
+```
+
+#### Run with Docker CLI
+
+To persist your configuration and response files, mount a local directory to `/app` in the container. The application will create default files in that directory if it is empty.
+
+```bash
+# Create a folder for your mock data
+mkdir mock-data
+
+# Run the container and mount the folder
+docker run -p 3000:3000 -v $(pwd)/mock-data:/app dhl
+```
+
+#### Run with Docker Compose
+
+An example `docker-compose.yml` is provided in the root directory:
+
+```yaml
+version: '3.8'
+
+services:
+  dhl:
+    build: .
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./mock-data:/app
+    restart: unless-stopped
+```
+
+To start:
+```bash
+docker-compose up -d
+```
+
+**Note:** The default host is set to `0.0.0.0` for Docker compatibility. If you are using a custom `config.json`, ensure the `host` is set to `0.0.0.0`.
+
 ### Release Assets
 
 When downloading a release, you will find: