Add automated Docker Hub publishing workflow

- Add GitHub Actions workflow for building and publishing Docker images
- Trigger on version tags (v*) to publish to Docker Hub
- Update README with Docker Hub deployment instructions

README.md

@@ -36,13 +36,36 @@ This project is a simple Flask API for demonstrating AR content retrieval for ba
 
 ## Setup
 
-### Option 1: Docker (Recommended)
+### Option 1: Docker Hub (Recommended)
+
+Pull and run the pre-built image from Docker Hub:
+
+```bash
+# Pull the latest image
+docker pull mattintech/kcapdemoserver:latest
+
+# Run the container
+docker run -p 5555:5000 \
+  -e SECRET_KEY=your-secret-key-here \
+  -e DATABASE_URL=sqlite:///data/kcap_demo.db \
+  -v $(pwd)/data:/app/data \
+  mattintech/kcapdemoserver:latest
+```
+
+Or use a specific version:
+
+```bash
+docker pull mattintech/kcapdemoserver:v1.0.0
+docker run -p 5555:5000 --env-file .env mattintech/kcapdemoserver:v1.0.0
+```
+
+### Option 2: Docker Compose
 
 1. **Clone the Repository:**
 
 ```bash
-git clone <repository_url>
-cd <repository_folder>
+git clone https://github.com/mattintech/KCAPDemoServer.git
+cd KCAPDemoServer
 ```
 
 2. **Configure Environment:**
@@ -75,7 +98,7 @@ docker-compose logs -f
 docker-compose down
 ```
 
-### Option 2: Local Python Setup
+### Option 3: Local Python Setup
 
 1. **Clone the Repository:**
 
@@ -149,6 +172,18 @@ The following barcode types are available:
         └── generate_barcode.html # Barcode generation page
 ```
 
+## Docker Hub
+
+Pre-built Docker images are automatically published to Docker Hub on each release:
+
+**Repository**: [mattintech/kcapdemoserver](https://hub.docker.com/r/mattintech/kcapdemoserver)
+
+**Available Tags**:
+- `latest` - Most recent release
+- `v1.0.0`, `v1.0.1`, etc. - Specific version releases
+
+For maintainers: See [DOCKER_HUB_SETUP.md](DOCKER_HUB_SETUP.md) for information on configuring automated builds.
+
 ## Implementation Notes
 
 * The application is designed as a single server hosting both the API endpoints and admin interface.