add test stage in workflow

.forgejo/workflows/deploy.yml

@@ -1,6 +1,18 @@
-on: [push]
+on:
+  push:
+    branches:
+      - live
+      - testing
 jobs:
   test:
+    runs-on: docker
+    container:
+      image: docker.io/python:latest
+    steps:
+      - run: pip install -r core/requirements.dev.txt
+      - run: python manage.py test
+
+  deploy:
     runs-on: docker
     container:
       image: docker.io/serversideup/ansible:latest