feat: add Dockerfile and docker-compose for containerized deployment

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,23 @@
+# -- Build stage --
+FROM python:3.12-slim AS base
+
+# Prevent Python from writing .pyc files and enable unbuffered output
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+# Install dependencies first (layer caching)
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY app/ ./app/
+COPY config/ ./config/
+
+# Create data directory for SQLite
+RUN mkdir -p /app/data
+
+EXPOSE 8000
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]