Retrieved from the venerable Original Swarm Client, this is the single HTML page we started using before Bee had directory support.
The old Swarm gateway was delivered in a mishmash of Go templates and inline styles and javascript. I worked on the actual website in a brutally similistic and naive mode and then copy pasted it into what was already due to a mixture of time constraints, the lay of the land when i found it and my own personal golang learning curve which was most steep at that point.
The historical record of that can be found here
Contributions welcome ;D