[Python] building Docker image ModuleNotFoundError: No module named 'distutils'

Im new on Dockers. I tried Ai to get a solution but moving nowhere. Context: Im trying to build the image given this docker file ( below) and i keep getting " ModuleNotFoundError: No module named 'distutils'" I appreciate any help. Thx !

# Step 1: Use Ubuntu 20.04 as base
FROM ubuntu:20.04

# Step 2: Set non-interactive frontend
ARG DEBIAN_FRONTEND=noninteractive

# Step 3: Ensure Python logs everything immediately
ENV PYTHONUNBUFFERED=1

# Step 4: Install Python 3.12.8 from deadsnakes PPA (INCLUDE venv & dev)
RUN apt-get update && apt-get install -y software-properties-common
RUN add-apt-repository ppa:deadsnakes/ppa && apt-get update
RUN apt-get install -y python3.12 python3-pip python3.12-venv python3.12-dev

# Step 5: Upgrade pip and install setuptools, wheel
RUN python3.12 -m pip install --no-cache-dir --upgrade pip setuptools wheel

# Step 6: Install FastAPI and Uvicorn
RUN python3.12 -m pip install --no-cache-dir fastapi==0.115.6 uvicorn==0.33.0

# Step 7: Create a working directory
WORKDIR /app

# Step 8: Copy everything from the current directory into the working directory
COPY . /app

# Step 9: Expose port 8000
EXPOSE 8000

# Step 10: Define ENTRYPOINT to use Uvicorn
ENTRYPOINT ["uvicorn"]

# Step 11: CMD command to start FastAPI app
CMD ["app.main:app", "--host", "0.0.0.0", "--port", "8000"]


im trying to build a docker image, i tried changing the order i create layers but i keep getting the same error.

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