Add a Docker build and push workflow

.github/workflows/docker_build_push.yml

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+name: Push Docker Image
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+env:
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ vars.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_PASSWORD }}
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: |
+            my-docker-hub-namespace/my-docker-hub-repository
+            ghcr.io/${{ github.repository }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64, linux/arm64

Dockerfile

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+FROM ubuntu as builder
+
+RUN apt-get update > /dev/null && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends build-essential libreadline-dev libffi-dev git pkg-config libsdl2-2.0-0 libsdl2-dev python3 parallel ca-certificates > /dev/null && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY ./.git /src/.git
+COPY ./lib /src/lib
+COPY ./mpy-cross /src/mpy-cross
+COPY ./ports/unix /src/ports/unix
+COPY ./py /src/py
+COPY ./extmod /src/extmod
+COPY ./shared /src/shared
+COPY ./drivers /src/drivers
+COPY ./tools /src/tools
+COPY ./docs /src/docs
+
+WORKDIR /src
+
+RUN git submodule update --init --recursive lib/lv_bindings
+
+RUN make -C mpy-cross && \
+    make -C ports/unix submodules VARIANT=dev && \
+    make -C ports/unix VARIANT=dev
+
+FROM ubuntu
+
+COPY --from=builder /src/ports/unix/micropython-dev /usr/local/bin
+
+RUN apt-get update > /dev/null && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends libsdl2-2.0-0 > /dev/null && \
+    rm -rf /var/lib/apt/lists/*

hooks/post_checkout

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+#!/bin/bash
+
+git submodule update --init --recursive