Add timeout wait to Cypress

This should tell Cypress to wait for the app to come up before timing out (300)

Author: MooseQuest

.github/workflows/pythonapp.yml

@@ -44,4 +44,6 @@ jobs:
       uses: cypress-io/[email protected]
       with:
         working-directory: e2e
+        wait-on: 'http://localhost:8000'
+        wait-on-timeout: 300