feat: add health check and heartbeat endpoint to Docker setup

Dockerfile

@@ -4,10 +4,16 @@ FROM python:3.13.1-slim-bookworm
 COPY requirements.txt /app/requirements.txt
 RUN pip install --no-cache-dir -r /app/requirements.txt
 
+# Install curl
+RUN apt-get update && apt-get install -y curl
+
 # Copy the application
 COPY main.py /app
 COPY utils/ /app/utils
 WORKDIR /app
 
 # Run the application
-CMD ["python", "main.py"]
+CMD ["python", "main.py"]
+
+# Healthcheck
+HEALTHCHECK --interval=5s --timeout=10s --retries=5 CMD curl -f http://localhost/heartbeat || exit 1