The tag imgshould look like this:
<img src="static/images/{{ employee.profile_image }}" alt={{ employee.name }} width="120" height="90" />
, employee.profile_image - static/images/
profile_image , , Jinja2 default.
<img src="static/images/{{ employee.profile_image | default('profile.jpg') }}" alt={{ employee.name }} width="120" height="90" />