Added nginx proxy worker configuration to template and defaults

This is something that got lost during
https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/456
and more specifically 4d62a75f6f.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/914

Mostly affects people who disable the integrated `matrix-nginx-proxy`.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/456
and more specifically 4d62a75f6f.

They're gone now: b8ce80e476

Run Let's Encrypt renewal checks daily instead of weekly.

This ensures more timely updates of certifcates.

This seems to have been added to the list of "deprecated files to
remove" by mistake.

People who were disabling matrix-nginx-proxy (in favor of their own
nginx webserver) and also overriding `matrix_federation_public_port`,
found that the generated nginx configuration still hardcoded `8448`,
which forced their nginx server to use that, regardless of the fact
that `matrix_federation_public_port` was pointing elsewhere.

We now allow for the in-container federation port to be configurable,
and also automatically wire things properly.

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/456

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/904

This reverts commit fd3d48bb6d.

Normally this environment variable gets referred to from `settings.json.docker`,
but we have our own full configuration, which hardcodes `"trustProxy": true`,
thus making this useless.

This has been pointed out here:
fd3d48bb6d (commitcomment-47403097)

Added paragraph about updating DNS to get stats

This document didn't describe that it is necessary to have a DNS-entry for stats sub-domain.

Recommend a better way of backing up postgres

don't spawn an extra container
run pg_dumpall within matrix-postgres instead, ensures correct version
store under /matrix so a backup of the folder will contain a DB dump
use absolute paths just in case something in the ENV is messed up

Update lower power config example

All other examples show the config to lower the memory usage on the server

added "matrix_%SERVICE%_version" variable to all roles

Update Telegram bridge setup link

Same reasoning as in 1cd251ed78

Change markdown to use link instead of tags for Telegram App setup

add support for mautrix-instagram

This only seems to be affecting some people badly enough to cause
matrix-postgres not to start. Certain systemd versions probably handle
it better or something.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/889
(hopefully)

This probably got lost somehow in all the work that happened in
https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/456

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/887

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/872

Add mx-puppet-groupme support

Synapse workers

Adding more presets in the future would be nice.

We're talking about a webserver running on the same machine, which
imports the configuration files generated by the `matrix-nginx-proxy`
in the `/matrix/nginx-proxy/conf.d` directory.

Users who run an nginx webserver on some other machine will need to do
something different.

fix wrong json parameter in webhook documentation

Related to: https://matrix.org/blog/2021/02/18/synapse-1-27-0-released#dropping-armv7-docker-images

Add Netlify instructions

fixes HTTP 400 Error: "{\"errcode\":\"M_MISSING_PARAM\",\"error\":\"Missing key 'avatar_url'\"}"

Remove 'sqlite3' from the Etherpad role

The official Etherpad Docker image has no support for sqlite3 databases.