@Richard-Rouse Welcome to the user group.
Looks like you have integrated parts of the V1 website into your custom website. It must have been a fun project.
V1 is still available, but this version is not being maintained any more. If you really need it then check out the V1 branch.
V2 is the currently available, and maintained version. This is totally different and you will have to start again. Sorry.
There's a super small viewer available in the regl-renderer directory. Please see the README for additional information.
Let us know if you have questions. There are several people who have created custom websites.