update message

Author: noogen

README.md

@@ -114,6 +114,9 @@ And if that doesn't work, you can always use your custom nginx config by passing
 * Scale with watermark - http://imageproxy.niiknow.org/rx/2000,water_1/https://octodex.github.com/images/codercat.jpg
 ![Scale with watermark](http://imageproxy.niiknow.org/rx/2000,water_1/https://octodex.github.com/images/codercat.jpg)
 
+# December 2021 Update
+We're still using this project so maintenance and security update continues until further notice, but we're no longer adding new feature.  We're also takening down example server so demo images above may not work in the future.
+
 # Point of Interest
 * [images.weserv.nl](https://github.com/weserv/images) is another great project to look at if you need additional features with image resizing.  The original purpose of this library (nginx-image-proxy) is to provide high performance and low resource utilization image private microservice.  We searched high and low but did not find a good solution.  At that time, we saw great potential with images.weserv.nl, but was held back because it was using php.  Since July 2018, it was rewritten with lua and direct c binding; as a result, it has became the next best solution and continue to improve.  The authors also generiously provide free endpoint for public use.  This help prove their implementation to be well battle-tested for use in any production environment.
 > Update, as of September 2019, images.weserv.nl was rewritten again as C++ so it has now became the better/best choice.  We are now sun-setting this project, only maintenance and security support - no new feature, for the future date of December 2021 or 2 years from December 2019.