Isolate template options definition

src/glicid_spawner/form.py

@@ -9,6 +9,7 @@ TEMPLATES = Environment(
     loader=PackageLoader('glicid_spawner'),
     autoescape=select_autoescape(),
 )
+TEMPLATE_FORM = TEMPLATES.get_template('spawner_form.html')
 
 
 def options_attrs(username: str) -> dict:
@@ -24,8 +25,7 @@ def options_attrs(username: str) -> dict:
 
 def options_form(username: str) -> str:
     """Render default spawner form."""
-    template = TEMPLATES.get_template('interactive.html')
-    return template.render(**options_attrs(username))
+    return TEMPLATE_FORM.render(**options_attrs(username))
 
 
 def options_from_form(formdata) -> dict: