We are in the process of revamping our community portal and as part of the new design we have a background photo in it.
could you please confirm where can we host in our instance ?
what is the procedure for on premise instance ?
Create a post in a PM or in a category like #staff, and include the desired image in the post. This will lupload the image to Discourse and make it available. In the resulting post, you can right-click the image to get the URL where it has been uploaded.