🐛 Handled trailing slashes in resized image URLs

no issue

- requests for resized images with a trailing slash would end up
  throwing a EISDIR error because it got through to writing an
  image buffer to a directory
- we want to cut this off early and disallow trailing slashes

core/server/web/shared/middlewares/image/handle-image-sizes.js

@@ -4,12 +4,17 @@ const storage = require('../../../../adapters/storage');
 const activeTheme = require('../../../../../frontend/services/themes/active');
 
 const SIZE_PATH_REGEX = /^\/size\/([^/]+)\//;
+const NO_TRAILING_SLASH_REGEX = /\/+$/;
 
 module.exports = function (req, res, next) {
     if (!SIZE_PATH_REGEX.test(req.url)) {
         return next();
     }
 
+    if (NO_TRAILING_SLASH_REGEX.test(req.url)) {
+        return next();
+    }
+
     const [sizeImageDir, requestedDimension] = req.url.match(SIZE_PATH_REGEX);
     const redirectToOriginal = () => {
         const url = req.originalUrl.replace(`/size/${requestedDimension}`, '');