fix(ci): Install Node/Yarn in Playwright image from package.json versions

Read node and yarn versions from the root package.json volta config and
pass them as build args to the Dockerfile. This ensures the Docker image
always has Node and Yarn installed at the same versions the repo pins.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mydea

.github/actions/ensure-playwright-image/action.yml

@@ -14,15 +14,20 @@ outputs:
 runs:
   using: 'composite'
   steps:
-    - name: Get Playwright version
-      id: playwright
+    - name: Get versions
+      id: versions
       run: |
-        VERSION=$(node -p "
+        PLAYWRIGHT_VERSION=$(node -p "
           const pkg = require('./dev-packages/browser-integration-tests/package.json');
           const v = (pkg.dependencies || {})['@playwright/test'] || (pkg.devDependencies || {})['@playwright/test'];
           v.replace(/[~^]/, '')
         ")
-        echo "version=$VERSION" >> $GITHUB_OUTPUT
+        ROOT_PKG=$(node -p "JSON.stringify(require('./package.json').volta)")
+        NODE_VERSION=$(echo "$ROOT_PKG" | node -p "JSON.parse(require('fs').readFileSync(0,'utf8')).node")
+        YARN_VERSION=$(echo "$ROOT_PKG" | node -p "JSON.parse(require('fs').readFileSync(0,'utf8')).yarn")
+        echo "playwright=$PLAYWRIGHT_VERSION" >> $GITHUB_OUTPUT
+        echo "node=$NODE_VERSION" >> $GITHUB_OUTPUT
+        echo "yarn=$YARN_VERSION" >> $GITHUB_OUTPUT
       shell: bash
 
     - name: Verify @playwright/test version consistency
@@ -69,7 +74,7 @@ runs:
       shell: bash
       run: |
         DOCKERFILE_HASH=$(sha256sum .github/docker/playwright.Dockerfile | cut -c1-8)
-        TAG="v${{ steps.playwright.outputs.version }}-${DOCKERFILE_HASH}"
+        TAG="v${{ steps.versions.outputs.playwright }}-${DOCKERFILE_HASH}"
         echo "ref=ghcr.io/${{ github.repository }}/playwright:${TAG}" >> $GITHUB_OUTPUT
 
     - name: Check if image already exists
@@ -101,6 +106,8 @@ runs:
         file: .github/docker/playwright.Dockerfile
         push: true
         build-args: |
-          PLAYWRIGHT_VERSION=${{ steps.playwright.outputs.version }}
+          PLAYWRIGHT_VERSION=${{ steps.versions.outputs.playwright }}
+          NODE_VERSION=${{ steps.versions.outputs.node }}
+          YARN_VERSION=${{ steps.versions.outputs.yarn }}
         tags: |
           ${{ steps.image.outputs.ref }}

.github/docker/playwright.Dockerfile

@@ -3,15 +3,17 @@
 FROM ghcr.io/actions/actions-runner:2.333.1
 
 ARG PLAYWRIGHT_VERSION
+ARG NODE_VERSION
+ARG YARN_VERSION
 
 # Prevent interactive prompts during package installation
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Install a temporary Node.js to bootstrap Playwright browser installation.
-# At runtime, actions/setup-node handles Node/Yarn from the workflow steps.
-RUN sudo curl -fsSL https://deb.nodesource.com/setup_20.x | sudo bash - && \
+# Install Node.js and Yarn at the versions pinned in the repo's package.json.
+RUN sudo curl -fsSL https://deb.nodesource.com/setup_${NODE_VERSION%%.*}.x | sudo bash - && \
     sudo apt-get install -y --no-install-recommends nodejs && \
-    sudo rm -rf /var/lib/apt/lists/*
+    sudo rm -rf /var/lib/apt/lists/* && \
+    sudo npm install -g yarn@${YARN_VERSION}
 
 # Install Playwright browsers and their OS-level dependencies.
 # `--with-deps` installs required system libraries (libglib, libatk, libnss, etc.).