Match bare /docs path in Caddyfile route

The /docs/* matcher only catches /docs/<sub>, so a request to the
bare /docs path fell through to the static UI handler and returned
index.html instead of FastAPI's Swagger UI. Add /docs as an explicit
matcher alongside /docs/* so both the entry point and the assets it
loads reach imbi-api.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dave-shawley

Caddyfile

@@ -12,7 +12,7 @@
 		reverse_proxy 127.0.0.1:8002
 	}
 
-	handle /docs/* {
+	handle /docs /docs/* {
 		reverse_proxy 127.0.0.1:8000
 	}