fix: install dependencies so that megalinter can use our configs

.github/workflows/mega-linter.yml

@@ -20,6 +20,13 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: 'npm'
+      - name: Install dependencies
+        run: npm ci
       - name: MegaLinter
         uses: oxsecurity/megalinter/flavors/[email protected]
         id: ml