fix: add url prefix back on when provided a redirect location starting with /

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

Speculatively added for the other services

Caddyfile

@@ -1,22 +1,30 @@
 {$HOSTNAME} {
 	route /api* {
 		uri strip_prefix /api
-		reverse_proxy http://api:14702
+		reverse_proxy http://api:14702 {
+			header_down Location "^/" "/api/"
+		}
 	}
 
 	route /ws {
 		uri strip_prefix /ws
-		reverse_proxy http://events:14703
+		reverse_proxy http://events:14703 {
+			header_down Location "^/" "/ws/"
+		}
 	}
 
 	route /autumn* {
 		uri strip_prefix /autumn
-		reverse_proxy http://autumn:14704
+		reverse_proxy http://autumn:14704 {
+			header_down Location "^/" "/autumn/"
+		}
 	}
 
 	route /january* {
 		uri strip_prefix /january
-		reverse_proxy http://january:14705
+		reverse_proxy http://january:14705 {
+			header_down Location "^/" "/january/"
+		}
 	}
 
 	reverse_proxy http://web:5000