Add documented method for setting values in `/etc/zulip/zulip.conf`

[CkovMk]

I run zulip in a docker environment.

As the title described, I encountered this issue when following this guide, which needs to config zulip to allow HTTP.

Is there any workaround for this? Or what's the recommended approach to make the docker container serve via HTTP only?

Many thanks!

[ben221199]

I encountered the same issue when trying to set loadbalancer IPs (#353) and made a pull request (#356) for it. However, maybe it would be nice if it is possible to change zulip.conf using environment parameters or in some other way.

[i-ky]

You may want to use Docker Configs to store config file separately from the container.

[timabbott]

We now have documentation on how to setup a proxy. I agree it'd be nice to have a way to set values in zulip.conf beyond MANUAL_CONFIGURATION, though; it should be possible to write something using crudini to make sure edits.