Reload uvicorn on html file change

[monosans]

Description

Checklist:

• [X] I've made sure that tests are updated accordingly (especially if adding or updating a template option)
• [X] I've updated the documentation or confirm that my change doesn't require any updates

Rationale

After changing the html file uvicorn must be reloaded for Django to pick up the changes, otherwise it will show the old version of the template.