update docker file

Dockerfile

@@ -73,11 +73,11 @@ COPY --from=builder --link /opt/venv /opt/venv
 
 # Copy application code (files that need chown cannot use --link)
 COPY --from=builder --chown=appuser:appuser /build/pyproject.toml /build/uv.lock ./
-COPY --chown=appuser:appuser ./backend/alembic.ini ./
-COPY --chown=appuser:appuser ./backend/migrations/ ./backend/migrations/
-COPY --chown=appuser:appuser ./backend/generate_fernet_key.py ./backend/migrate.py ./backend/startup.py ./backend/setup.py ./backend/init_qdrant.py ./
-COPY --chown=appuser:appuser ./backend/data/ ./backend/data/
-COPY --chown=appuser:appuser ./backend/app/ ./backend/app/
+COPY --chown=appuser:appuser backend/alembic.ini ./
+COPY --chown=appuser:appuser backend/migrations/ ./migrations/
+COPY --chown=appuser:appuser backend/generate_fernet_key.py backend/migrate.py backend/startup.py backend/setup.py backend/init_qdrant.py ./
+COPY --chown=appuser:appuser backend/data/ ./data/
+COPY --chown=appuser:appuser backend/app/ ./app/
 
 # Create logs and cache directories
 RUN mkdir -p /app/logs /app/.cache/huggingface && \
@@ -88,5 +88,9 @@ USER appuser
 
 EXPOSE 7860
 
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
+    CMD curl -f http://localhost:7860/health || exit 1
+
 # Run the application (migrations happen in startup lifespan)
 CMD ["/opt/venv/bin/uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]