i will write Documentation for your website with all diagrams.
but for perfect documentation you are supposed to give access to your application so i could test every function to do it in documentation. the prices depends on the pages, functionalities(of application) and the length of documentation. You will have to communicate constantly until order get done. 3 revisions will be included in 1 order , if you want any change kindly notify me with changes but do not give negative Review. You can ask for refund if work is not done according to requirements.