Update "Step by Step Deployment" documentation

[fboucher]

• Update deployment process
• update the post-deployment process ( like Custom domain)

[fboucher]

ARM template seems valid and creates the 5 resources required. Error on provisioning the Azure Function

The specified project 'C:\home\site\repository\src\shortenerTools' is not valid. It needs to point to either a csproj/vbproj file or to a directory.

[fboucher]

Error fixed deployment works.

todos

• update Deploy to Azure links(under buttons)
• finish updating the docs (removing the no required steps)

[fboucher]

The deployment didn't generate any error but the azFunction is not created. The hypothesis is that the project path is not defined and because it's not at the root level it won't work.

• [ ] Define working directory