nginx based on alpine:3.8 with nginx-dav-ext-module
Please notice, that these image is just a base image which includes all the dependencies you need to run a nginx with webdav-ext methods. The configuration for webdav itself is not included!
Getting a webdav running with nginx on a raspberry pi is easy with the offical image. But nginx-dav-ext-module is currently not supported, so I had to do it by my own. Result is, that I used the code from arut/nginx-dav-ext-module, changed the original Dockerfile and done the build from scratch. After a long time of compiling it finally works!