Download the template here, edit it as needed, and save it as a PDF
Upload the PDF to your Google Drive
Share your PDF on Google Drive by choosing to share with "anyone with the link" (even outside your organization). Copy the link to your clipboard.
Edit the Atlas page. Click "Edit" (the little pencil) at the top of the document. Add your item to the list. Then, select the label, and click on the little chain link icon at the top. Choose “webpage” on the left. Paste in your link, and click "open in new window".