add install python

Author: tinyg210

.github/workflows/ci.yml

@@ -19,6 +19,14 @@ jobs:
     name: Setup infrastructure using Terraform
     runs-on: ubuntu-latest
     steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+
       - name: Start LocalStack
         run: |
           docker pull localstack/localstack:latest