Refactor GitHub Actions workflow to install LaTeX dependencies and build document directly, updating artifact upload step

.github/workflows/main.yml

@@ -9,9 +9,12 @@ on:
 jobs:
   build_latex:
     runs-on: ubuntu-latest
-    container: node
+    container: ubuntu:latest
 
     steps:
+      - name: Install Node.js
+        uses: actions/setup-node@v4.2.0
+
       - name: Set up Git repository
         uses: actions/checkout@v4.2.2