You can create a public URL to your file so anyone with the link can use it.
- At the top right, click Get shareable link
- Make sure its set to "Anyone with the link can view", if not, click Sharing Settings.
- Click the drop down menu and select "Anyone with the link can view". Then, click "Copy link" and Done at the bottom of the window.
- Copy and paste the link into the Webpage app for use.