Add GHA CI builds

.github/workflows/build.yml

@@ -0,0 +1,24 @@
+name: build
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        shell: sh
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@latest
+
+      - name: Install dependencies
+        run: sudo apt install -y build-essential libbluetooth-dev
+
+      - name: Compile
+        run: make