Add Docker support (Dockerfile, docker-compose.yml, .dockerignore)

.dockerignore

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+# Git
+.git
+.gitignore
+
+# Python
+__pycache__
+*.pyc
+*.pyo
+*.egg-info
+.pytest_cache
+
+# IDE
+.vscode
+.idea
+*.swp
+*.swo
+
+# Downloads (keep directory but not files)
+downloads/*
+!downloads/.gitkeep
+
+# Logs
+*.log
+nohup.out
+
+# HAR files (large)
+*.har
+
+# Test files
+test_*.py
+*.test.*
+do_fix.py
+do_fix.sh
+
+# OS files
+.DS_Store
+Thumbs.db

Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+    ffmpeg \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy application files
+COPY . .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt 2>/dev/null || pip install --no-cache-dir \
+    flask \
+    requests \
+    gunicorn \
+    m3u8 \
+    pypdl \
+    python-slugify \
+    yt-dlp \
+    2>/dev/null || true
+
+# Create downloads directory
+RUN mkdir -p /app/downloads /app/cookies
+
+# Expose port
+EXPOSE 8770
+
+# Run with gunicorn for production
+CMD ["gunicorn", "--bind", "0.0.0.0:8770", "--workers", "2", "--threads", "4", "app:app"]

docker-compose.yml

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+services:
+  xstream-downloader:
+    build: .
+    container_name: xstream-downloader
+    ports:
+      - "8770:8770"
+    volumes:
+      - ./downloads:/app/downloads
+      - ./cookies:/app/cookies
+    environment:
+      - FLASK_ENV=production
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8770/"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s