The `sizeLimit` parameter must be a number. Be aware that the unit is in bytes, and the default is 1000000. When setting this value high, you should make sure to also configure the body parser middleware `maxFileSize` so the file can be sent and processed. Read more [here](https://docs.strapi.io/developer-docs/latest/plugins/upload.html#configuration)
Special configuration of the Strapi Security Middleware is not required on this provider since the default configuration allows loading images and media from `"'self'"`.