Restore missing project configuration files

Restored all configuration and documentation files that were missing:
- devenv.nix and devenv.lock for development environment
- README.md, CLAUDE.md, DOCKER.md, WARP.md for documentation
- alembic.ini for database migrations
- requirements.txt for Python dependencies
- Dockerfile, docker-compose.yml, entrypoint.sh for containerization
- build.sh for build automation
- pytest.ini for test configuration

All database concurrency improvements and logging fixes remain intact.

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

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

Dockerfile

@@ -0,0 +1,51 @@
+# Multi-stage Docker build for DosVault
+FROM python:3.11-slim as base
+
+# Set working directory
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    curl \
+    gcc \
+    g++ \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy Python dependencies
+COPY requirements.txt* pyproject.toml* ./
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt || \
+    pip install --no-cache-dir fastapi uvicorn sqlalchemy alembic \
+    aiohttp bcrypt python-jose python-multipart jinja2
+
+# Copy application code
+COPY src/ ./src/
+COPY templates/ ./templates/
+COPY migrations/ ./migrations/
+COPY alembic.ini ./
+COPY CLAUDE.md README.md ./
+COPY entrypoint.sh ./
+
+# Create necessary directories
+RUN mkdir -p /app/data/logs /app/data/images /app/data/roms /app/data/metadata
+
+# Set environment variables
+ENV PYTHONPATH=/app/src
+ENV DOSFRONTEND_CONFIG_DIR=/app/data
+
+# Expose ports
+EXPOSE 8080 8081
+
+# Create non-root user
+RUN useradd -m -u 1000 dosvault && \
+    chown -R dosvault:dosvault /app
+USER dosvault
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:8080/health || exit 1
+
+# Default command
+# CMD ["python", "-m", "uvicorn", "src.webapp:app", "--host", "0.0.0.0", "--port", "8080"]
+ENTRYPOINT ["./entrypoint.sh"]