Add PPC Ubuntu Docker image and use it on CI

Author: aobolensk

.github/workflows/docker.yml

@@ -0,0 +1,45 @@
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - 'docker/**'
+  pull_request:
+    paths:
+      - 'docker/**'
+
+env:
+  IMAGE: ghcr.io/learning-process/ppc-ci:latest
+
+jobs:
+  build-and-push:
+    name: Build & Push Docker Image
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: linux/amd64,linux/arm64
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push multi-arch image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: ./docker/ubuntu.Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ghcr.io/learning-process/ppc-ubuntu:latest

docker/ubuntu.Dockerfile

@@ -0,0 +1,29 @@
+FROM ubuntu:24.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential              \
+    ca-certificates curl wget gnupg lsb-release software-properties-common \
+    python3 python3-pip          \
+    ninja-build cmake make       \
+    ccache                       \
+    valgrind                     \
+    libmpich-dev mpich           \
+    openmpi-bin openmpi-common libopenmpi-dev \
+    libomp-dev                   \
+    gcc-14 g++-14                \
+    gcovr                        \
+ && rm -rf /var/lib/apt/lists/*
+
+RUN wget -q https://apt.llvm.org/llvm.sh        \
+ && chmod +x llvm.sh                            \
+ && ./llvm.sh 20 all                            \
+ && rm llvm.sh                                  \
+ && apt-get clean
+
+SHELL ["/bin/bash", "-eo", "pipefail", "-c"]
+
+ENV CC=gcc-14 CXX=g++-14
+
+CMD ["bash"]