Moved margin value to the dimensions API

src/library/entry.cr

@@ -117,7 +117,6 @@ class Entry
           sizes << {
             "width"  => size.width,
             "height" => size.height,
-            "margin" => Config.current.page_margin,
           }
         rescue e
           Logger.warn "Failed to read page #{i} of entry #{zip_path}. #{e}"

src/routes/api.cr

@@ -664,6 +664,7 @@ struct APIRouter
         send_json env, {
           "success"    => true,
           "dimensions" => sizes,
+          "margin" => Config.current.page_margin
         }.to_json
       rescue e
         send_json env, {