Just an update on the pihole docker addon situation.
We still do not plan on updating the pihole docker addon due to the issues listed above.
However, there is now a docker addon for adguard, which is just as good if not better.
It runs in docker much nicer than pihole. All the settings are done via the gui.
It is available in the linuxserver docker addon repo.
Here's a blog article on adguard: AdGuard Home: First Thoughts
One year later, but I have a question regarding this addon. I've been trying both Pi-Hole and AdGuard Home these past week to see how they worked. I kind of like AdGuard more, since I can use Cloudflare for DNS, but I have an important issue and it's that Chrome (or chromium based browsers) won't block ads on Android. I can see apps blocking ads, other browsers (the one that comes with MIUI) also do block ads, but Chrome and Samsung browser didn't.
I guess it's some kind of misconfiguration on my part? I'm using your Pi-Hole right now (which blocks everything) but I would really like to use AdGuard. Running this on some chinese TV box with libreelec installed, in case it helps.