GHA: Handle removal of Node 16

Download an unofficial Node 20 build against glibc 2.17

Author: Flamefire

.github/workflows/ci.yml

@@ -134,8 +134,12 @@ jobs:
 
     timeout-minutes: 120
     runs-on: ${{matrix.os}}
-    container: ${{matrix.container}}
-    env: {B2_USE_CCACHE: 1, ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION: true}
+    container:
+      image: ${{matrix.container}}
+      volumes:
+        - /node20217:/node20217:rw,rshared
+        - ${{ startsWith(matrix.container, 'ubuntu:1') && '/node20217:/__e/node20:ro,rshared' || ' ' }}
+    env: {B2_USE_CCACHE: 1}
 
     steps:
       - name: Setup environment
@@ -158,22 +162,26 @@ jobs:
                 echo "B2_USE_CCACHE=0" >> $GITHUB_ENV
             fi
             git config --global pack.threads 0
+            if [[ "${{matrix.container}}" == "ubuntu:1"* ]]; then
+              # Node 20 doesn't work with Ubuntu 16/18 glibc: https://github.com/actions/checkout/issues/1590
+              curl -sL https://unofficial-builds.nodejs.org/download/release/v20.9.0/node-v20.9.0-linux-x64-glibc-217.tar.xz | tar -xJ --strip-components 1 -C /node20217
+            fi
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           # For coverage builds fetch the whole history, else only 1 commit using a 'fake ternary'
           fetch-depth: ${{ matrix.coverage && '0' || '1' }}
 
       - name: Cache ccache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         if: env.B2_USE_CCACHE
         with:
           path: ~/.ccache
           key: ${{matrix.os}}-${{matrix.container}}-${{matrix.compiler}}-${{github.sha}}
           restore-keys: ${{matrix.os}}-${{matrix.container}}-${{matrix.compiler}}-
 
       - name: Fetch Boost.CI
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: boostorg/boost-ci
           ref: master