Add Docker deployment with Caddy HTTPS reverse proxy

CPU-only torch image (~180MB vs 873MB CUDA), PipeWire socket
passthrough for audio playback, SNAC HuggingFace cache volume.
Served at voice.l.supported.systems via caddy-docker-proxy.

Dockerfile

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+FROM ghcr.io/astral-sh/uv:python3.13-bookworm-slim
+
+# PipeWire client tools — pw-play connects to the host's PipeWire socket
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    pipewire-bin \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+ENV UV_COMPILE_BYTECODE=1
+
+# Create venv
+RUN uv venv
+
+# Install CPU-only torch first (saves ~3GB vs CUDA — SNAC runs on CPU anyway)
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv pip install torch --index-url https://download.pytorch.org/whl/cpu
+
+# Install project dependencies (torch already satisfied, won't redownload)
+COPY pyproject.toml ./
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv pip install --no-deps -r pyproject.toml 2>/dev/null || true
+
+# Copy source and install project
+COPY src/ src/
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv pip install .
+
+# Non-root user matching host uid for PipeWire socket access
+RUN useradd -u 1000 -m tts \
+    && mkdir -p /home/tts/.cache/huggingface \
+    && chown -R tts:tts /home/tts/.cache
+USER tts
+
+ENV PATH="/app/.venv/bin:$PATH"
+EXPOSE 8371
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=15s \
+    CMD python -c "import socket; s=socket.create_connection(('127.0.0.1',8371),2); s.close()" || exit 1
+
+CMD ["tts-mcp"]

Makefile

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+include .env
+export
+
+.PHONY: build up down logs restart status
+
+build:
+	docker compose build
+
+up: build
+	docker compose up -d
+	@sleep 2
+	docker compose logs --tail 20
+
+down:
+	docker compose down
+
+logs:
+	docker compose logs -f
+
+restart:
+	docker compose restart
+	@sleep 2
+	docker compose logs --tail 20
+
+status:
+	@docker compose ps
+	@echo "---"
+	@curl -s http://localhost:8371/mcp 2>/dev/null | head -5 || echo "Server not responding"

docker-compose.yml

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+services:
+  tts-mcp:
+    build: .
+    container_name: tts-mcp
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      # Override for Docker networking (container DNS instead of IPs)
+      TTS_PIPER_HOST: piper-tts
+      TTS_OLLAMA_URL: http://host.docker.internal:11434
+      # PipeWire client config
+      XDG_RUNTIME_DIR: /run/user/1000
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    volumes:
+      # Kokoro ONNX models (read-only)
+      - ./models:/app/models:ro
+      # HuggingFace cache for SNAC model download
+      - hf-cache:/home/tts/.cache/huggingface
+      # PipeWire socket for audio playback through host speakers
+      - /run/user/1000/pipewire-0:/run/user/1000/pipewire-0
+    networks:
+      - caddy
+      - dootie-internal
+    labels:
+      caddy: voice.l.supported.systems
+      caddy.reverse_proxy: "{{upstreams 8371}}"
+
+volumes:
+  hf-cache:
+
+networks:
+  caddy:
+    external: true
+  dootie-internal:
+    external: true