add yml to .github folder for nightly.link

.github/workflows/build_latex.yml

@@ -0,0 +1,39 @@
+name: Build Latex document
+
+# Controls when the action will run.
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  create:
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  build_latex:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Git repository
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Compile LaTeX document
+        uses: xu-cheng/latex-action@v2
+        with:
+          root_file: aanda.tex
+      - uses: actions/upload-artifact@v3
+        with:
+          name: PDF
+          path: aanda.pdf
+      - name: Upload binaries to release
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: svenstaro/upload-release-action@v2
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: aanda.pdf
+          asset_name: aanda_$tag.pdf
+          tag: ${{ github.ref }}
+          overwrite: true
+          body: "Automatic release through Github Actions"