fix: have caddy apply url prefix to relative redirects from services

[Docteh]

…g with /

Definitely required for autumn, as /autumn/attachments/:id: will redirect to /attachments/:id:/:filename: But we want the browser to redirect to /autumn/attachments/:id:/:filename:

Speculatively added for the other services

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fixes #137

[Docteh]

I guess I need to limit git commit titles to 70 characters. oops.

[Docteh]

Tweaked the commit message so that the title is now under 70 characters

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fix: have caddy apply url prefix to relative redirects from services

Definitely required for autumn, as an example /autumn/attachments/:id: will redirect to /attachments/:id:/:filename: But since we are self-hosting, the requester (client) actually needs to be redirected to /autumn/attachments/:id:/:filename:

Speculatively added for the other services