Improved caddy configuration

docs/config.md

@@ -579,6 +579,15 @@ or the root domain:
 
     ntfy.sh, http://nfty.sh {
         reverse_proxy 127.0.0.1:2586
+
+        # Redirect HTTP to HTTPS, but only for GET topic addresses, since we want
+        # it to work with curl without the annoying https:// prefix
+        @httpget {
+            protocol http
+            method GET
+            path_regexp ^/([-_a-z0-9]{0,64}$|docs/|static/)
+        }
+        redir @httpget https://{host}{uri}
     }
     ```