Node workflow - build linux arm64 in a container (#520)

Co-authored-by: acalcutt <acalcutt@worcester.edu>

platform/node/scripts/Dockerfile_Build

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+FROM ubuntu:focal
+
+RUN set -ex; \
+    export DEBIAN_FRONTEND=noninteractive; \
+    apt-get -qq update; \
+    apt-get -y --no-install-recommends install \
+      ca-certificates \
+      wget \
+      libjpeg-dev \
+      libpng-dev \
+      ccache \
+      cmake \
+      ninja-build \
+      pkg-config \
+      xvfb \
+      libcurl4-openssl-dev \
+      libglfw3-dev \
+      libuv1-dev \
+      libicu-dev \
+      libjpeg-turbo8 \
+      g++-10 \
+      libc++-9-dev \
+      libc++abi-9-dev; \
+    wget -qO- https://deb.nodesource.com/setup_18.x | bash; \
+    apt-get install -y nodejs;
+
+VOLUME /data
+
+RUN mkdir -p /usr/src/app
+COPY / /usr/src/app
+ENTRYPOINT ["/usr/src/app/platform/node/scripts/docker_build_entrypoint.sh"]
+RUN ["chmod", "+x", "/usr/src/app/platform/node/scripts/docker_build_entrypoint.sh"]

platform/node/scripts/docker_build_entrypoint.sh

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+#!/bin/bash
+
+node -v
+cat /etc/os-release
+uname -m
+
+cd /usr/src/app
+npm ci --ignore-scripts
+ccache --clear --set-config cache_dir=~/.ccache
+cmake . -B build -G Ninja  -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_COMPILER_LAUNCHER=ccache -DCMAKE_C_COMPILER=gcc-10 -DCMAKE_CXX_COMPILER=g++-10
+cmake --build build -j $(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null)
+cp -R ./lib/ /data/lib/
+
+xvfb-run --auto-servernum ./build/mbgl-render-test-runner --manifestPath metrics/macos-xcode11-release-style.json
+xvfb-run --auto-servernum npm test