add github action

.github/workflows/generate_pdf.yml

@@ -0,0 +1,20 @@
+name: Generate PDF
+
+on:
+  push:
+    paths:
+      - '**/*.tex'
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Run Docker container to generate PDF
+        run: ./build.sh
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}

build.sh

@@ -1 +1,9 @@
-docker run -v "$(pwd)":/usr/src/tex --rm  rekka/tectonic tectonic cv.tex
+set -e
+
+docker run -v "$(pwd)":/usr/src/tex --rm rekka/tectonic tectonic cv.tex
+
+if [[ `git status --porcelain` ]]; then
+  git add cv.pdf
+  git commit -m "generate new pdf"
+  git push
+fi