Improve home and api root pages

Author: camilamaia

demo/api/views.py

@@ -33,6 +33,7 @@
 
 def root(request):
     return HttpResponse(
+        "<h2>ScanAPI Demo API</h2>"
         "<a href=https://demo.scanapi.dev/api/health>https://demo.scanapi.dev/api/health</a> (GET)<br>"
         "<a href=https://demo.scanapi.dev/api/devs>https://demo.scanapi.dev/api/devs</a> (GET, POST)<br>"
         "<a href=https://demo.scanapi.dev/api/devs?newOpportunities=true>https://demo.scanapi.dev/api/devs?newOpportunities=true</a> (GET)<br>"

demo/urls.py

@@ -4,8 +4,9 @@
 
 def home(request):
     return HttpResponse(
-        "Welcome to ScanAPI Demo."
-        "\n\nAccess the demo api at: https://demo.scanapi.dev/api"
+        "<h2>ScanAPI Demo</h2>"
+        "<p>This is an application to help showing how ScanAPI works</p>"
+        "<p>Access the demo API at: <a href=https://demo.scanapi.dev/api>https://demo.scanapi.dev/api</a></p>"
     )