fix: Enforce min_chunk_size in RAG chunker

- Filter out chunks smaller than min_chunk_size (default 100 tokens)
- Exception: Keep all chunks if entire document is smaller than target size
- All 15 tests passing (100% pass rate)

Fixes edge case where very small chunks (e.g., 'Short.' = 6 chars) were
being created despite min_chunk_size=100 setting.

Test: pytest tests/test_rag_chunker.py -v

Dockerfile.mcp

@@ -0,0 +1,56 @@
+# Skill Seekers MCP Server - Docker Image
+# Optimized for MCP server deployment (stdio + HTTP modes)
+
+FROM python:3.12-slim
+
+LABEL maintainer="Skill Seekers <noreply@skillseekers.dev>"
+LABEL description="Skill Seekers MCP Server - 25 tools for AI skills generation"
+LABEL version="2.9.0"
+
+WORKDIR /app
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    git \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user
+RUN useradd -m -u 1000 -s /bin/bash mcp && \
+    mkdir -p /app /data /configs /output && \
+    chown -R mcp:mcp /app /data /configs /output
+
+# Copy application files
+COPY --chown=mcp:mcp src/ src/
+COPY --chown=mcp:mcp configs/ configs/
+COPY --chown=mcp:mcp pyproject.toml README.md ./
+
+# Install dependencies
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -e ".[all-llms]" && \
+    pip install --no-cache-dir mcp
+
+# Switch to non-root user
+USER mcp
+
+# Environment variables
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    MCP_TRANSPORT=http \
+    MCP_PORT=8765 \
+    SKILL_SEEKERS_HOME=/data \
+    SKILL_SEEKERS_OUTPUT=/output
+
+# Health check for HTTP mode
+HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
+    CMD curl -f http://localhost:${MCP_PORT}/health || exit 1
+
+# Volumes
+VOLUME ["/data", "/configs", "/output"]
+
+# Expose MCP server port
+EXPOSE 8765
+
+# Start MCP server in HTTP mode by default
+# Use --transport stdio for stdio mode
+CMD ["python", "-m", "skill_seekers.mcp.server_fastmcp", "--transport", "http", "--port", "8765"]