feat: Add Step 13 - Search System with Apache Solr and Data Persistence

- Implemented search service with Apache Solr instead of Elasticsearch
- Added full-text search, faceted search, and autocomplete capabilities
- Created data indexer for synchronizing data from MongoDB/Kafka to Solr
- Configured external volume mounts for all data services:
  - MongoDB, Redis, Kafka, Zookeeper, MinIO, Solr
  - All data now persists in ./data/ directory
- Added comprehensive search API endpoints
- Created documentation for data persistence and backup strategies

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

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

services/search/backend/Dockerfile

@@ -0,0 +1,21 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first for better caching
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create necessary directories
+RUN mkdir -p /app/logs
+
+# Run the application
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000", "--reload"]