Rocket's templating is not exactly friendly when it comes to embedding
in-binary. Rocket's template fairing requires a `template_dir` directory
pointing to the directory containing templates.
A quick workaround to this would be to have custom fairings with
`template_dir` merged with the value `.`
But in bare-metal scenarios like what docker's scratch image mimics, we
don't exactly have a '.' file, so instead for this very project, I have
to point the `template_dir` to the `upload` folder, which is created by
`bin` on execution. Checkout the Dockerfile for more info
Signed-off-by: Gunwant Jain <mail@wantguns.dev>
