Upload the Resource Pack
Upload the resource pack to Dropbox or a similar filesharing service.

Copy the Download Link
Click the share button and copy the direct download link for the resource pack.

Log In to the Control Panel ↗

Select Your Server

Stop the Server

Click on the Files tab

Edit server.properties

Paste the Resource Pack Link
Scroll down to ‘resource-pack=’ and paste the copied link.

Start the Server

Your resource pack has been successfully configured.