feat(docker): add Dockerfile and docker-compose.yml for containerized deployment

Dockerfile

@@ -0,0 +1,21 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Install dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application source
+COPY . .
+
+# Ensure data directory exists for SQLite WAL storage
+RUN mkdir -p /app/data
+
+ENV HOST=0.0.0.0 \
+    PORT=8002 \
+    PYTHONUNBUFFERED=1
+
+EXPOSE 8002
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8002"]