Add compile workflow on self-hosted runner

.github/workflows/compile.yml

@@ -0,0 +1,19 @@
+name: Compile main
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  do_compile:
+    runs-on: self-hosted
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Compile and run
+        run: |
+          uname -a
+          clang++ -o hello hello.cpp
+          file hello
+          ./hello

hello.cpp

@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+  std:: cout << "Hello World" << std::endl;
+  return 0;
+}