Build linux binaries in 18.04 docker container

Bump node version to 18.16.0 (latest version that has arm64 windows builds) and use 18.16.1 nodejs unofficial-builds on 18.04 dockerfile. Official nodejs 18+ requires GLIBC 2.28 (bionic has 2.27).

Add electron dependencies for checking with unit tests as well.

.github/workflows/ci.yml

@@ -17,12 +17,13 @@ jobs:
   build:
     name: ${{ matrix.friendlyName }} ${{ matrix.arch }}
     runs-on: ${{ matrix.os }}
+    container: ${{ matrix.image }}
     permissions:
       contents: write
     strategy:
       fail-fast: false
       matrix:
-        node: [18.14.0]
+        node: [18.16.0]
         os: [macos-11, windows-2019, ubuntu-20.04]
         arch: [x64, arm64]
         include:
@@ -32,16 +33,46 @@ jobs:
             friendlyName: Windows
           - os: ubuntu-20.04
             friendlyName: Ubuntu
+            image: ubuntu:18.04
     timeout-minutes: 60
     steps:
+      - name: Install dependencies into dockerfile on Ubuntu
+        if: matrix.os == 'ubuntu-20.04'
+        run: |
+          # ubuntu dockerfile is very minimal (only 122 packages are installed)
+          # add dependencies expected by scripts
+          apt update
+          apt install -y software-properties-common lsb-release \
+          sudo wget curl build-essential jq autoconf automake \
+          pkg-config ca-certificates rpm \
+          # add electron dependencies
+          apt install -y libasound2 libatk-bridge2.0-0 libatk1.0-0 \
+          libatspi2.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libdrm2 \
+          libexpat1 libgbm1 libgcc1 libglib2.0-0 libgtk-3-0 libnspr4 \
+          libnss3 libpango-1.0-0 libx11-6 libxcb1 libxcomposite1 \
+          libxdamage1 libxext6 libxfixes3 libxkbcommon0 libxrandr2 \
+          libsecret-1-0
+          # install new enough git to run actions/checkout
+          sudo add-apt-repository ppa:git-core/ppa -y
+          sudo apt update
+          sudo apt install -y git
+          # avoid "fatal: detected dubious ownership in repository at '/__w/shiftkey/desktop'" error
+          git config --global --add safe.directory '*'
       - uses: actions/checkout@v3
         with:
           submodules: recursive
       - name: Use Node.js ${{ matrix.node }}
+        if: matrix.os != 'ubuntu-20.04'
         uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}
           cache: yarn
+      - name: Install unofficial-builds Node.js 18.16.1 on Ubuntu
+        if: matrix.os == 'ubuntu-20.04'
+        run: |
+          # this version supports older GLIBC (official builds required a minimum of GLIBC 2.28)
+          curl -sL 'https://unofficial-builds.nodejs.org/download/release/v18.16.1/node-v18.16.1-linux-x64-glibc-217.tar.xz' | xzcat | sudo tar -vx  --strip-components=1 -C /usr/local/
+          sudo npm install --global yarn
 
       # This step can be removed as soon as official Windows arm64 builds are published:
       # https://github.com/nodejs/build/issues/2450#issuecomment-705853342