npm dependencies cache (sugarlabs#5345)

Author: varruunnn

.github/workflows/linter.yml

@@ -1,47 +1,48 @@
 name: ESLint
 
 on:
-  pull_request:
-    branches: [master]
+    pull_request:
+        branches: [master]
 
 jobs:
-  lint:
-    name: Lint updated JavaScript files with ESLint
-
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-          ref: ${{ github.event.pull_request.head.sha }}
-
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20.x
-
-      - name: Get changed JavaScript files
-        id: get_files
-        run: |
-          CHANGED_FILES=$(git diff --diff-filter=ACMRT --name-only ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} -- '*.js')
-          echo "files<<EOF" >> $GITHUB_ENV
-          echo "$CHANGED_FILES" >> $GITHUB_ENV
-          echo "EOF" >> $GITHUB_ENV
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Run ESLint on changed files
-        if: env.files != ''
-        run: |
-          echo "Linting the following files:"
-          echo "$files"
-          echo "$files" | xargs npx eslint
-      - name: Run Prettier check on changed files
-        if: env.files != ''
-        run: |
-          echo "Checking formatting for the following files:"
-          echo "$files"
-          echo "$files" | xargs npx prettier --check
+    lint:
+        name: Lint updated JavaScript files with ESLint
+
+        runs-on: ubuntu-latest
+
+        steps:
+            - name: Checkout code
+              uses: actions/checkout@v4
+              with:
+                  fetch-depth: 0
+                  ref: ${{ github.event.pull_request.head.sha }}
+
+            - name: Set up Node.js
+              uses: actions/setup-node@v4
+              with:
+                  node-version: 20.x
+                  cache: "npm"
+
+            - name: Get changed JavaScript files
+              id: get_files
+              run: |
+                  CHANGED_FILES=$(git diff --diff-filter=ACMRT --name-only ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} -- '*.js')
+                  echo "files<<EOF" >> $GITHUB_ENV
+                  echo "$CHANGED_FILES" >> $GITHUB_ENV
+                  echo "EOF" >> $GITHUB_ENV
+
+            - name: Install dependencies
+              run: npm ci
+
+            - name: Run ESLint on changed files
+              if: env.files != ''
+              run: |
+                  echo "Linting the following files:"
+                  echo "$files"
+                  echo "$files" | xargs npx eslint
+            - name: Run Prettier check on changed files
+              if: env.files != ''
+              run: |
+                  echo "Checking formatting for the following files:"
+                  echo "$files"
+                  echo "$files" | xargs npx prettier --check