add github actions

Author: pitycycy

.github/workflows/hello_workflow.yaml

@@ -0,0 +1,11 @@
+name: hello_workflow
+on: [push]
+jobs:
+  print-hello:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Hello world using echo
+        run: echo "$(<hello.txt)"
+      - name: Hello world using cat
+        run: cat hello.txt

README.md

@@ -1 +1,5 @@
-# example-github-actions-helloworld
+# example-github-actions-helloworld
+
+## 参考资料
+
+![https://hyperskill.org/learn/step/20853](https://hyperskill.org/learn/step/20853)

hello.txt

@@ -0,0 +1 @@
+Hello world from github