Add build.yml

.github/workflows/build.yml

@@ -0,0 +1,15 @@
+on:
+  push:
+    branches:
+      - githubactions
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/checkout@v1
+    - name: install dependencies
+      run: sudo apt update && sudo apt install libglu1-mesa-dev
+    - name: bootstrap
+      run: .ci/bootstrap.sh