Add multi-GPU support for Docker deployments

- Created separate docker-compose override files for different GPU types:
  - docker-compose.nvidia.yml for NVIDIA GPUs
  - docker-compose.amd.yml for AMD GPUs with ROCm
  - docker-compose.apple.yml for Apple Silicon
- Updated README with GPU-specific Docker configurations
- Updated deployment instructions to use appropriate override files
- Added detailed configurations for each GPU type including:
  - Device mappings and drivers
  - Environment variables
  - Platform specifications
  - Memory and resource limits

This allows users to easily deploy Talk2Me with their specific GPU hardware.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker-compose.amd.yml

@@ -0,0 +1,19 @@
+version: '3.8'
+
+# Docker Compose override for AMD GPU support (ROCm)
+# Usage: docker-compose -f docker-compose.yml -f docker-compose.amd.yml up
+
+services:
+  talk2me:
+    environment:
+      - HSA_OVERRIDE_GFX_VERSION=10.3.0  # Adjust based on your GPU model
+      - ROCR_VISIBLE_DEVICES=0  # Use first GPU
+    volumes:
+      - /dev/kfd:/dev/kfd  # ROCm KFD interface
+      - /dev/dri:/dev/dri  # Direct Rendering Interface
+    devices:
+      - /dev/kfd
+      - /dev/dri
+    group_add:
+      - video  # Required for GPU access
+      - render # Required for GPU access