feat: add Docker deployment support and fix /users/me endpoint

- Add docker/ directory with Dockerfile for backend and frontend
- Backend: pytorch/pytorch CUDA base image with all qwen_tts deps
- Frontend: multi-stage nginx build with /api/ proxy to backend
- docker-compose.yml (CPU) + docker-compose.gpu.yml (GPU overlay)
- Fix /users/me returning 404 due to missing route (was caught by /{user_id})
- Update .gitignore to exclude docker/models, docker/data, docker/.env
- Update README and README.zh.md with Docker deployment instructions

Images: bdim404/qwen3-tts-backend, bdim404/qwen3-tts-frontend

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker/.env.example

@@ -0,0 +1,2 @@
+SECRET_KEY=change-this-to-a-strong-random-key
+MODEL_DEVICE=cuda:0

docker/backend/.dockerignore

@@ -0,0 +1,16 @@
+.git
+docs
+images
+**/__pycache__
+**/*.pyc
+**/*.pyo
+qwen3-tts-backend/Qwen
+qwen3-tts-backend/outputs
+qwen3-tts-backend/voice_cache
+qwen3-tts-backend/*.db
+qwen3-tts-backend/.env
+qwen3-tts-frontend/node_modules
+qwen3-tts-frontend/dist
+qwen3-tts-frontend/.env
+models
+data

docker/backend/Dockerfile

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+FROM pytorch/pytorch:2.5.1-cuda12.1-cudnn9-runtime
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libsndfile1 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY qwen3-tts-backend/requirements.txt .
+COPY docker/backend/requirements.qwen_tts.txt .
+RUN pip install --no-cache-dir -r requirements.txt -r requirements.qwen_tts.txt
+
+COPY qwen_tts ./qwen_tts
+COPY qwen3-tts-backend .
+
+RUN mkdir -p /app/Qwen /app/data /app/voice_cache /app/outputs
+
+ENV PYTHONPATH=/app
+
+EXPOSE 8000
+
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]

docker/backend/requirements.qwen_tts.txt

@@ -0,0 +1,6 @@
+librosa
+einops
+transformers>=4.40.0,<5.0.0
+accelerate
+onnxruntime
+sox

docker/docker-compose.gpu.yml

@@ -0,0 +1,9 @@
+services:
+  backend:
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: 1
+              capabilities: [gpu]

docker/docker-compose.yml

@@ -0,0 +1,28 @@
+services:
+  backend:
+    build:
+      context: ..
+      dockerfile: docker/backend/Dockerfile
+    environment:
+      SECRET_KEY: ${SECRET_KEY:?Set SECRET_KEY in docker/.env}
+      MODEL_DEVICE: ${MODEL_DEVICE:-cuda:0}
+      MODEL_BASE_PATH: /app/Qwen
+      DATABASE_URL: sqlite:////app/data/qwen_tts.db
+      CACHE_DIR: /app/voice_cache
+      OUTPUT_DIR: /app/outputs
+    volumes:
+      - ./models:/app/Qwen
+      - ./data/db:/app/data
+      - ./data/cache:/app/voice_cache
+      - ./data/outputs:/app/outputs
+    restart: unless-stopped
+
+  frontend:
+    build:
+      context: ..
+      dockerfile: docker/frontend/Dockerfile
+    ports:
+      - "80:80"
+    depends_on:
+      - backend
+    restart: unless-stopped

docker/frontend/.dockerignore

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+.git
+docs
+images
+**/__pycache__
+**/*.pyc
+qwen3-tts-backend
+qwen_tts
+qwen3-tts-frontend/node_modules
+qwen3-tts-frontend/dist
+qwen3-tts-frontend/.env
+models
+data

docker/frontend/Dockerfile

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+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+COPY qwen3-tts-frontend/package*.json ./
+RUN npm ci
+
+COPY qwen3-tts-frontend/ .
+RUN npm run build
+
+FROM nginx:alpine
+
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY docker/frontend/nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]

docker/frontend/nginx.conf

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+server {
+    listen 80;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript;
+
+    location /api/ {
+        proxy_pass http://backend:8000/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_read_timeout 300s;
+        proxy_send_timeout 300s;
+        client_max_body_size 50m;
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}