Fix Node.js and Yarn installation in CI

Signed-off-by: Miki <[email protected]>

Author: Miki

.github/workflows/unit-tests-workflow.yml

@@ -26,21 +26,20 @@ jobs:
           repository: opensearch-project/OpenSearch-Dashboards
           ref: ${{ env.OPENSEARCH_DASHBOARDS_VERSION }}
           path: OpenSearch-Dashboards
-      - name: Get node and yarn versions
-        id: versions
-        run: |
-          echo "::set-output name=node_version::$(node -p "(require('./OpenSearch-Dashboards/package.json').engines.node).match(/[.0-9]+/)[0]")"
-          echo "::set-output name=yarn_version::$(node -p "(require('./OpenSearch-Dashboards/package.json').engines.yarn).match(/[.0-9]+/)[0]")"
-      - name: Setup node
-        uses: actions/setup-node@v1
+      - name: Setup Node
+        uses: actions/setup-node@v3
         with:
-          node-version: ${{ steps.versions.outputs.node_version }}
+          node-version-file: './OpenSearch-Dashboards/.nvmrc'
           registry-url: 'https://registry.npmjs.org'
-      - name: Install correct yarn version for OpenSearch-Dashboards
+      - name: Install Yarn
+        # Need to use bash to avoid having a windows/linux specific step
+        shell: bash
         run: |
-          npm uninstall -g yarn
-          echo "Installing yarn ${{ steps.versions_step.outputs.yarn_version }}"
-          npm i -g yarn@${{ steps.versions.outputs.yarn_version }}
+          YARN_VERSION=$(node -p "require('./OpenSearch-Dashboards/package.json').engines.yarn")
+          echo "Installing yarn@$YARN_VERSION"
+          npm i -g yarn@$YARN_VERSION
+      - run: node -v
+      - run: yarn -v
       - name: Checkout Security Analytics Dashboards plugin
         uses: actions/checkout@v2
         with: