Dashboard on Power Bi Services based on pbix file stored on local server

Dear User,

I have created report in my Power Bi Desktop with multiple data sources ( excel or csv files).

PBIX file along with the source files are stored on organizational file share server.

If I use the pbix file to create the dashboard in Power BI services , will I have to create on-premise gateway in order to refresh the dashboard?

And if so, should I set it to connect only to PBIX fileorPbix file and all data sources?

And also if  share the dashboard, will others be able to refresh it?

If on-premise gateway is not the way to go for me, could you plese send any suggestions how should I proceed ?

Thank You!

Agata