Update about the drone build and amazon s3 war artifact download. Also, ...

...the default repose-ui properties/config are provided and they can be overridden by specifying a sytem property repose-ui.config.location that points to a file that has properties to be overriden
Is this related to the root permissions issue? If not, then it may make sense to move it down one more line and give a bit more context as to why it might be desirable to override the default properties.