Added pytest requirement

Author: m-messer

.github/workflows/staging-deploy.yml

@@ -34,6 +34,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m venv .venv
+          .venv/bin/pip install pytest
           .venv/bin/pip install -r app/requirements.txt
 
       # TODO: add linting / black / flake8