feat: add Content-Disposition with param treat_as_download

Author: thenav56

caddy/Caddyfile

@@ -12,6 +12,11 @@
         max_size 10MB
     }
 
+    @download {
+        path /media/*
+        query treat_as_download=true
+    }
+
     @isStatic {
         path /static/* /media/*
     }
@@ -28,6 +33,11 @@
         Access-Control-Request-Methods "GET"
         Access-Control-Allow-Headers Content-Type
     }
+
+    # Allow website to have download feature for files which browser can open (eg: json)
+    header @download {
+        Content-Disposition "attachment; filename={http.request.uri.path.file}"
+    }
 }