Initial image based on ubuntu/risc

.github/workflows/build-ubuntu-22.04-risc.yml

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+name: Build Ubuntu 22.04 RISC Image
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'ubuntu-22.04-risc/*'
+      - '.github/workflows/build-ubuntu-22.04-risc.yml'
+  pull_request:
+  workflow_dispatch:
+  schedule:
+    - cron: '30 12 * * 5'
+
+concurrency:
+  # SHA is added to the end if on `main` to let all main workflows run
+  group: ${{ github.ref }}-${{ github.workflow }}-${{ github.event_name }}-${{ github.ref == 'refs/heads/main' && github.sha || '' }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    uses: Chia-Network/actions/.github/workflows/docker-build.yaml@main
+    with:
+      docker-context: "./ubuntu-22.04-risc"
+      dockerfile: "./ubuntu-22.04-risc/Dockerfile"
+      dockerhub_imagename: "chianetwork/ubuntu-22.04-risc-builder"
+      docker-platforms: linux/riscv64
+    secrets:
+      DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+      DOCKERHUB_PAT: ${{ secrets.DOCKERHUB_PAT }}

ubuntu-22.04-risc/Dockerfile

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+FROM riscv64/ubuntu:focal
+
+ENV PYENV_ROOT=/root/.pyenv
+ENV PATH="$PYENV_ROOT/shims:$PYENV_ROOT/bin:$PATH"
+
+RUN apt-get install -y curl make libssl-dev zlib1g zlib1g-dev libreadline-dev libffi-dev  \
+#    && \
+#    curl https://pyenv.run | bash && \
+#    PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --skip-existing 3.8 && \
+#    PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --skip-existing 3.9 && \
+#    PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --skip-existing 3.10 && \
+#    PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install --skip-existing 3.11 && \
+#    pyenv global 3.11