Add github action

.github/workflows/build.yml

@@ -0,0 +1,18 @@
+name: Build
+on: [push, pull_request]
+jobs:
+  ubuntu:
+    name: Ubuntu
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Clone Tree
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
+      - name: Build
+        run: make
+      - name: Upload artifact
+        uses: actions/upload-artifact@v1
+        with:
+          name: lindbergh-loader
+          path: build/