Business workflow document

[jura1985]

Update the document with the business workflow of implementing an IT web project.
https://docs.google.com/document/d/1EecrEHBMGa3JfFdkePIjUX1JESCFBt8x242mmjExJUo/edit

Tasks:

• Review comments made by Damir and update the document accordingly
• Update the workflow diagram to match the document updates and upload it