Add CI

.github/workflows/ci.yml

@@ -0,0 +1,18 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build-binary:
+    runs-on: ubuntu-18.04
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+    - name: build binary
+      run: |
+        docker run --rm -v ${PWD}:/project garyodernichts/moonlightbuilder make
+    - uses: actions/upload-artifact@master
+      with:
+       name: binary
+       path: "*.rpx"