Add Prometheus metrics outside manage.py – docker related

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My manage.py looks like this:

import os
import sys
from prometheus_client import start_http_server, Summary
import random
import time

if __name__ == "__main__":
    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "core.settings")
    s = Summary('request_latency_seconds', 'Description of summary')
    s.observe(4.7)    # Observe 4.7 (seconds in this case)
    try:
        from django.core.management import execute_from_command_line
    except ImportError:
        # The above import may fail for some other reason. Ensure that the
        # issue is really that Django is missing to avoid masking other
        # exceptions on Python 2.
        try:
            import django
        except ImportError:
            raise ImportError(
                "Couldn't import Django. Are you sure it's installed and "
                "available on your PYTHONPATH environment variable? Did you "
                "forget to activate a virtual environment?"
            )
        raise
    execute_from_command_line(sys.argv)

If I run my django app using docker, I am able to see added Summary metrics. However, if I try to run Django management command, created metric object will be not added to Prometheus.
I am basically trying to add many metrics the same way I did it with Summary, but I dont want my exposed port to be stopped (if I run loop inside manage.py, it will stop)… ideally, if I would be able to run management command (I will exec to running container, and run command like "python manage.py prometheus"), where I will be able to create objects such as here in manage.py, and they will be present in Prometheus. Maybe I will have to attach somehow to exposed port, because outside manage.py it does not work.
I am using this api: https://github.com/prometheus/client_python#summary
But I don’t find

start_http_server(8000)

very useful, as docker is already creating its own server.
Thank you, and sorry for confusion

Source: Docker Questions