Diet Cake Board exercise

1st PR
hi po, since that is my index and home page
for example typing in "website.com"
will have no get parameter
that's why i needed to check po if there's no page specified or
page specified po is not a number,then set page to 1
and removing that statement results in an error po in my sql
because i needed a value for page num for my limit param in sql
thanks po