Added workflow files.

.github/workflows/test-mango.yml

@@ -7,10 +7,14 @@ permissions:
 
 jobs: 
   build:
-    runs-on: python:3.8.10
+    runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.8'
     - name: Install dependencies
       run: |
         pip install virtualenv