Proxy Pass not working
Solution 1:
it looks like proxy_http_module isn't getting loaded, make sure you have following inside of your httpd.conf:
LoadModule proxy_http_module modules/mod_proxy_http.so
Solution 2:
make sure that mod_proxy is enabled, and that it is loaded BEFORE mod_proxy_http. Apache doesn’t support dependency management of modules, so they have to be enabled in the appropriate order.
https://docs.docker.com/registry/recipes/apache/