refactor(Dockerfile): remove unnecessary environment variable and use ENTRYPOINT for script execution

Remove the DEBUG environment variable as it is not essential for the Dockerfile and can be set dynamically at runtime if needed. Replace CMD with ENTRYPOINT to ensure the Python script is executed as the main process of the container, providing better control over the container's lifecycle and allowing additional arguments to be passed if necessary.

Dockerfile

···
 # Install any necessary dependencies
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Copy the current directory contents into the container at /app
+# Copy the current directory contents into the container
 COPY . /app
 
-# Define environment variables (optional, can also set dynamically at runtime)
-ENV DEBUG=true
-
 # Run the Python script
-CMD ["python", "bm_monitor.py"]
+ENTRYPOINT ["python", "/app/bm_monitor.py"]