Install javascript dependencies

Author: hartsick

Diff for: .github/actions/setup-action/action.yml

@@ -3,8 +3,15 @@ description: "Installs dependencies"
 runs:
   using: "composite"
   steps:
-    - name: Install Ruby and gems
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: "3.3"
-        bundler-cache: true
+  - name: Install Ruby and gems
+    uses: ruby/setup-ruby@v1
+    with:
+      ruby-version: "3.3"
+      bundler-cache: true
+  - name: Install npm
+    uses: actions/setup-node@v4
+    with:
+      cache: npm
+      cache-dependency-path: 'package-lock.json'
+  - name: Install JS dependencies
+    run: npm ci