How to reduce the build time/cache Docker image layer in subsequent GitHub Actions runs?

Question

I have a Dockerfile with ubuntu:22.04 as a base image and a manual Python installation(specific version i.e., 3.11.1) layer which takes a long time. How to cache this manual Python installation layer in the docker image in subsequent CI runs in GitHub actions?

Dockerfile:

FROM --platform=linux/amd64 ubuntu:22.04 as base USER root ENV PYTHONDONTWRITEBYTECODE 1 ENV PYTHONUNBUFFERED 1 ENV DEBIAN_FRONTEND noninteractive COPY ZscalerRootCertificate-2048-SHA256.crt /usr/local/share/ca-certificates/ZscalerRootCertificate-2048-SHA256.crt RUN apt-get update && \ apt-get upgrade -y && \ apt-get install -y software-properties-common ca-certificates && \ update-ca-certificates RUN mkdir /python && cd /python && \ wget https://www.python.org/ftp/python/3.11.1/Python-3.11.1.tgz && \ tar -zxvf Python-3.11.1.tgz && \ cd Python-3.11.1 && \ ls -lhR && \ ./configure --enable-optimizations && \ make install && \ rm -rf /python # Fail soon than later, if python wasn't installed RUN python --version COPY . /app WORKDIR /app RUN python -m pip install -U pip RUN python3.11 -m pip install --no-cache-dir --trusted-host pypi.org --trusted-host files.pythonhosted.org -r requirements/core-requirements.txt CMD ["gunicorn", "main:app", "--workers", "2", "--worker-class", "uvicorn.workers.UvicornWorker", "--bind", "0.0.0.0:80"] 

GitHub workflow,

CI.yml:

name: Docker Image CI env: CONTAINER_NAME: my-use-case on: workflow_dispatch: concurrency: group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }} cancel-in-progress: true permissions: id-token: write contents: write jobs: integration-tests: name: Integration Test runs-on: ubuntu-latest steps: - name: Checkout code uses: actions/checkout@v3 - name: View directory files run: | pwd echo "$PATH" - name: Set up Python uses: actions/setup-python@v4 with: python-version: "3.11.1" - name: Copy Python binaries to Docker context run: | mkdir -p Python/3.11.1 cp -r $RUNNER_TOOL_CACHE/Python/3.11.1/* Python/3.11.1 - name: View directory files run: | ls -lhR echo "$PATH" - name: Install dependencies run: | python --version python -m pip install --upgrade pip - name: View directory files run: | ls -lhR - name: Build & push docker image uses: docker/build-push-action@v2 with: context: . push: false tags: ${{ env.CONTAINER_NAME }}:${{ github.run_number }} file: ./Dockerfile