wikenigma
Here the wiki is delivered via our own server (Apple Sierra server apache with home-brew php). Both wikis are like the following:
https://IP:port/xyz/wiki_original and
https://IP:port/xyz/wiki_test
With a configured copy-program I copy wiki_original to wiki_test with just one click. Then I apply any change to wiki_test. As soon as this works I also apply the change to wiki_original. In case it does not work, but. f.e. damaged the wiki, I can recopy wiki_original to wiki_test with just that one click.