You can use images within proxied content on one of two ways. Your images will align as stated in your proxy. We recommend you match the alignment setting with those used by EdWeb.
Uploading to EdWeb
This image was uploaded to EdWeb. It is referenced by using a relative URL, leading EdWeb to search within the uploads for this proxy page.
Referencing the direct absolute URL
This image is hosted in the proxied application hosting server. It is referenced by using an absolute URL, leading EdWeb to load it by making a call to the external server.
Remember that you are still responsible for the accessibility of all proxied content. All images must include alt text.
There is comprehensive guidance about the web application content type on the EdWeb support wiki.