module Jekyll::Algolia

def self.start_time

that time to nil.
so we'll keep track of the time at build time and revert any page build at
run. The plugin needs those values to stay at nil if they did not change,
Jekyll will always set the updated time of pages to the time of the build

Public: Get access to the time at which the command was run
def self.start_time
  @start_time
end