Merge pull request #2 from greengiraffe/master

Add GitHub action that builds & uploads slides.tex as a PDF on every push

.github/workflows/main.yml

@@ -0,0 +1,21 @@
+name: CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v1
+    - name: Build slides.tex to slides.pdf
+      uses: xu-cheng/[email protected]
+      with:
+        root_file: slides.tex
+    - name: Upload slides.pdf as artifact  
+      uses: actions/upload-artifact@master  
+      with:
+        name: slides.pdf
+        path: slides.pdf