Adds 404 and 500 pages

they only show up when debug is off though, thankfully
Fixes #112

fedireads/views.py

@@ -25,6 +25,16 @@ def is_api_request(request):
             request.path[-5:] == '.json'
 
 
+def server_error_page(request):
+    ''' 500 errors '''
+    return TemplateResponse(request, 'error.html')
+
+
+def not_found_page(request, _):
+    ''' 404s '''
+    return TemplateResponse(request, 'notfound.html')
+
+
 @login_required
 def home(request):
     ''' this is the same as the feed on the home tab '''