When deploying a self hosted deployment of bitwarden and having a proxy infront of the deployment performing ssl offload, an option to have the nginx container to redirect x-forwarded-proto from http to https if the proxy sends traffic from port 80 to the internal http port.
That being said, this use case is specific to Synology and you may choose not to support it, but the feature request was provided for consideration.
I believe synology uses nginx under the hood so someone inclined to do so could attempt modifying the nginx config that synology creates or create their own (this may be an issue when updates occur though).
Having an option for the bitwarden-nginx container config to have a redirect to https seems like a potential solution to this use case.
As well since providing the option to set the base url to https:// when the users proxy is using SSL (https://github.com/bitwarden/core/issues/248) seems like a good solution and to close port 80 all together. This could be the recommended design strategy with Synology DSM implementation.
I’d say this feature request is more of a place holder to see if others agree with the need for redirects at the bitwarden-nginx level.