feat(core): add CI image for building Keyman Core

resources/docker-images/core/.gitignore

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+control

resources/docker-images/core/Dockerfile

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+# Copyright (c) 2024 SIL International. All rights reserved.
+
+ARG BASE_VERSION
+FROM --platform=amd64 keymanapp/keyman-base-ci:${BASE_VERSION}
+
+LABEL org.opencontainers.image.authors="SIL International."
+LABEL org.opencontainers.image.url="https://github.com/keymanapp/keyman.git"
+LABEL org.opencontainers.image.title="Keyman Core Build Image"
+
+USER root
+RUN apt-get install -qy git jq llvm meson pkgconf \
+  xvfb xserver-xephyr metacity
+
+#### TMP until we properly figure out the dependencies needed for Core
+#### We should not need to install /tmp/control
+# Install dependencies
+ADD control /tmp/control
+RUN apt-get install -qy python3 python3-setuptools python3-coverage \
+  devscripts equivs libdatetime-perl meson pkgconf lcov gcovr xvfb \
+  xserver-xephyr metacity mutter dbus-x11 weston xwayland && \
+  (yes | mk-build-deps --install /tmp/control) || true && \
+  rm /tmp/control
+#### TMP END
+
+# Install node
+ARG NODE_MAJOR
+RUN set -eu; \
+  NODE_VERSION=$(curl -sSL https://unofficial-builds.nodejs.org/download/release/ | cut -d'>' -f2 | cut -d'/' -f1 | grep v${NODE_MAJOR} | sort -V | tail -1) && \
+  echo "Installing node version ${NODE_VERSION}" && \
+  curl -fsSLO --compressed "https://unofficial-builds.nodejs.org/download/release/${NODE_VERSION}/node-${NODE_VERSION}-linux-x64-glibc-217.tar.xz" && \
+  tar -xJf "node-${NODE_VERSION}-linux-x64-glibc-217.tar.xz" -C /usr/local --strip-components=1 --no-same-owner && \
+  ln -s /usr/local/bin/node /usr/local/bin/nodejs
+
+# Install emscripten
+ARG EMSCRIPTEN_VERSION
+RUN echo "Installing emscripten version ${EMSCRIPTEN_VERSION}" && \
+  cd /usr/share && \
+  git clone https://github.com/emscripten-core/emsdk.git && \
+  cd emsdk && \
+  ./emsdk install ${EMSCRIPTEN_VERSION} && \
+  ./emsdk activate ${EMSCRIPTEN_VERSION} && \
+  echo "#!/bin/bash" > /usr/bin/bashwrapper && \
+  echo "export EMSCRIPTEN_BASE=/usr/share/emsdk/upstream/emscripten" >> /usr/bin/bashwrapper
+
+# Finish bashwrapper script and adjust permissions
+RUN <<EOF cat >> /usr/bin/bashwrapper
+
+if [[ "\$@" =~ test ]] && [ -f /usr/bin/run-tests.sh ]; then
+  /usr/bin/run-tests.sh "\${@:-bash}"
+else
+  "\${@:-bash}"
+fi
+EOF
+
+RUN chmod +x /usr/bin/bashwrapper && \
+  chown -R build:build $HOME
+
+# now, switch to build user
+USER build
+
+VOLUME /home/build/build
+WORKDIR /home/build/build
+
+ENTRYPOINT [ "/usr/bin/bashwrapper" ]