feat: Add Docker support with multi-stage build

Dockerfile

@@ -0,0 +1,76 @@
+# Multi-stage Docker build for Dolibarr MCP Server
+FROM python:3.11-slim as builder
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create working directory
+WORKDIR /app
+
+# Copy dependency files
+COPY requirements.txt pyproject.toml ./
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy source code
+COPY src/ ./src/
+COPY README.md LICENSE ./
+
+# Install the package
+RUN pip install -e .
+
+# Production stage
+FROM python:3.11-slim as production
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PATH="/opt/venv/bin:$PATH"
+
+# Create non-root user
+RUN groupadd -r dolibarr && useradd -r -g dolibarr dolibarr
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy installed packages from builder
+COPY --from=builder /usr/local/lib/python3.11/site-packages/ /usr/local/lib/python3.11/site-packages/
+COPY --from=builder /usr/local/bin/ /usr/local/bin/
+COPY --from=builder /app/src/ /app/src/
+
+# Create working directory and set ownership
+WORKDIR /app
+RUN chown -R dolibarr:dolibarr /app
+
+# Switch to non-root user
+USER dolibarr
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD dolibarr-mcp test || exit 1
+
+# Expose port (for future HTTP interface)
+EXPOSE 8080
+
+# Default command
+CMD ["dolibarr-mcp", "serve"]
+
+# Labels for metadata
+LABEL org.opencontainers.image.title="Dolibarr MCP Server" \
+      org.opencontainers.image.description="Professional Model Context Protocol server for Dolibarr ERP integration" \
+      org.opencontainers.image.url="https://github.com/latinogino/dolibarr-mcp" \
+      org.opencontainers.image.source="https://github.com/latinogino/dolibarr-mcp" \
+      org.opencontainers.image.version="1.0.0" \
+      org.opencontainers.image.licenses="MIT"