github action test

.github/workflows/build_docs.yml

@@ -0,0 +1,23 @@
+name: build documentation
+
+on: [push, pull_request]
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Git repository
+      - uses: actions/checkout@v3
+
+      - name: compile LaTeX document
+      - uses: xu-cheng/latex-action@v3
+        with:
+          working_directory: documentation
+          root_file: main.tex
+          texlive_version: 2023
+
+      - name: export pdf file
+      - uses: actions/upload-artifact@v3
+        with:
+          name: PDF
+          path: main.pdf