Animate HTML Canvas - How to use images hosted on an image sever like Scene7

Hi all, I am used Adobe Animate to design HTML Canvas banners for the site I work on.  I published my work and it is all working fine from my PC.  Now I need to host the banner on our site but we use a image sever to host all our images so I need to update all image ‘src’ to a URL ‘src’. Naively I thought it would be as simple as going into the JS file and updating the ‘src’ within ‘lib.properties’ with the URLs but this did not work and the image did not show. What I am I doing wrong? Any help world be helpful, Thanks   

lib.properties = {
   id: 'F9AAE7A85E627F4E959795A844F5CDBF',
   width: 1150,
   height: 300,
   fps: 30,
   color: "#333333",
   opacity: 1.00,
   manifest: [
      {src:"https://ui3.assets-asda.com/dm/_210105_bse_greenbg?fmt=png-alpha&scl=1", id:"_210105_bse_greenbg"},
      {src:"_210105_bse_justpaperroll01.png", id:"_210105_bse_justpaperroll01"}
   ],
   preloads: []
};