I followed this guide to set Simple HTTP Basic Auth and it works. I dockerized the application and all of a sudden the Auth pop-up which ask for user name and password does not show up anymore. I am running the application identically (i.e the same as I ran it locally but with docker)

I dont know what running it in docker would somehow remove that functionality. Is there something I am missing or not understanding? Meaning what would I have to change for this to be resolved.

I different configurations of Simple HTTP Basic Auth in FastApi. I also tried to ask AI chatbots

# HTTPBasic Logic
import secrets
from typing import Annotated

from fastapi import Depends, FastAPI, HTTPException, status
from fastapi.security import HTTPBasic, HTTPBasicCredentials


security = HTTPBasic()


def get_current_username(
    credentials: Annotated[HTTPBasicCredentials, Depends(security)],
):
    current_username_bytes = credentials.username.encode("utf8")
    correct_username_bytes = b"stanleyjobson"
    is_correct_username = secrets.compare_digest(
        current_username_bytes, correct_username_bytes
    )
    current_password_bytes = credentials.password.encode("utf8")
    correct_password_bytes = b"swordfish"
    is_correct_password = secrets.compare_digest(
        current_password_bytes, correct_password_bytes
    )
    if not (is_correct_username and is_correct_password):
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Incorrect username or password",
            headers={"WWW-Authenticate": "Basic"},
        )
    return credentials.username

app = FastAPI(dependencies=[Depends(get_current_username)])

# Docker 
FROM python:3.11
Create a user and group for the application
RUN addgroup --system app && adduser --system --group app

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1
ENV ENVIRONMENT=prod
ENV TESTING=0

RUN apt-get update -y && apt-get install -y 
    python3-dev 
    python3-venv 
    graphviz 
    libgraphviz-dev 
    pkg-config

WORKDIR /app/
UN python3 -m venv /app/venv

# Activate virtual environment and install requirements
RUN . /app/venv/bin/activate && pip install -r requirements.txt

# Set environment variable to ensure Python packages execute from the virtualenv
ENV PATH="/app/venv/bin:$PATH"

EXPOSE 8000

uvicorn --reload --host "127.0.0.1"  "main:app" --log-config=log_conf.yaml