Add our first workflow of GitHub Actions

.github/workflows/hello.yml

@@ -0,0 +1,14 @@
+name: Say hello
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  hello_world:
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Echo the message
+        run: |
+          echo "Hola midu!"