API url of python application is not working after docker-slim image

When running a python application with normal docker images, the application is running on Flask and the API URL is also working. When running this application with docker-slim image, the application is running but none of the APIs are working.
Get the following error "home:1 Access to XMLHttpRequest at 'http://localhost:7002/PATH' from origin 'http://localhost:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource."

I am running this application on Ubuntu 20.04.3 LTS machine.
docker version is 20.10.8.
docker-compose version is v2.0.1.
docker-slim version is 1.34.0.

I am running docker-compose up command and got the error that I have attached the screenshot.

The container hits the API at http://localhost:7002/PATH, and it works in the original python:3.9.7-buster image. Something about the slimming process appears to be removing something from the Requests library or something.

Start by reproducing the failure with the reported python:3.9.7-buster image, docker-compose, and docker-slim 1.34.0 on Ubuntu 20.04.3 LTS, comparing the working Docker image with the slimmed image and the attached error. Done means the Flask API at http://localhost:7002/PATH responds successfully from the application at http://localhost:8080.