fix: Cap padding at 12 to limit response amplification

Author: Fuwn

README.md

@@ -34,7 +34,7 @@ E.g., [mayu.due.moe/get/@demo?theme=urushi](https://mayu.due.moe/get/@demo?theme
 - `lain`
 - `garukura`
 
-Mayu will pad the counter number with zeroes until it reaches a length of 6 characters. You can modify this behaviour by changing the `padding` query parameter of any `get` operation.
+Mayu will pad the counter number with zeroes until it reaches a length of 6 characters. You can modify this behaviour by changing the `padding` query parameter of any `get` operation, up to a maximum of 12.
 
 ### Local
 

src/request.gleam

@@ -11,7 +11,7 @@ const default_theme = "asoul"
 
 const default_padding = 6
 
-const max_padding = 32
+const max_padding = 12
 
 fn middleware(request, handle) {
   let request = wisp.method_override(request)