[Hotfix][Files Deploy] document for enebuler 2.6.0 released, but Files Deploy secition was missing

[tomoyukikumagai]

We have released the document for enebular v.2.6.0, however for some reason files for "Files Deploy" feature was not properly uploaded.

For the time being I am copying the required files from the staging branch and placed them on the new hotfix branch to merge into the master.

[tomoyukikumagai]

I have created the hotfix #247.