Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2105

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2103

This keeps the configuration cleaner and hopefully prevents odd issues
if Synapse (by any chance) happens to interpret `pusher_instances: []`
as "no pushers", instead of as "push from the master process".

I haven't confirmed what an empty pushers/federation-senders list means,
so it's safer to just avoid it.

.. although.. manual configuration is discouraged in most cases.

As stream writer workers are also powered by the `generic_worker`
Synapse app, this necessitated that we provide means for distinguishing
between them and regular `generic_workers`.

I've also taken the time to optimize nginx configuration generation
(more Jinja2 macro usage, less duplication).

Worker names have also changed.
Workers are now named sequentially like this:
- `matrix-synapse-worker-0-generic`
- `matrix-synapse-worker-1-stream-writer-typing`
- `matrix-synapse-worker-2-pusher`

instead of `matrix-synapse-worker_generic_worker-18111` (indexed with a
port number).

People who modify `matrix_synapse_workers_enabled_list` directly will
need to adjust their configuration.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2101

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2089

We do the same everywhere else. This is an omission.

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

Fixes: #1144

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

`frontend_proxy` workers have been superseded by `generic_worker` workers.
Related to https://github.com/matrix-org/synapse/pull/13645

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2089

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2089

* Add construct for cactus comments role

* Adjust config files

* Add docker self build to defaults

* Adjust tasks

* Fix smaller syntax errors

* Fix env argument

* Add tmp path to allow container writing there

Background why I did this: https://docs.gunicorn.org/en/stable/settings.html#worker-tmp-dir

* Change port back to 5000 as not configurable in container

* Try to add appservice config file for synapse to use

* Inject appservice file

* Correct copied variable name

* Comment out unused app service file injection

would need mounting the appservice file to the synapse container i guess

* Move role before synapse to be able to inject during runtime

* Remove unused parts

* Change default user id to mirror official docs

* Add docs

* Update roles/matrix-cactus-comments/tasks/setup_install.yml

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

* Update roles/matrix-cactus-comments/templates/cactus_appservice.yaml.j2

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

* Generate secrets if necessary, adjust docs

* Rename cactusbot userid

* Shorten salt strings

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

* Use tmpfs instead of persistent mount

* Remove proxy option as it is nonsense

* Add download and serving of cc-client files

* Add documentation on client

* Clarify docs a bit

* Add nginx proxy to required services

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Use container address

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Correct comment of user id

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Use releases or local distributed client

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Move homeserver url to defaults

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Correct truth value

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Add documentation of variables

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

* Tabs vs. spaces

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

* Make nginx root configurable

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Complete ake nginx root configurable

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Fix file permission

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

* Fix lint errors

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>

Signed-off-by: Julian-Samuel Gebühr <julian-samuel@gebuehr.net>
Co-authored-by: Slavi Pantaleev <slavi@devture.com>

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2086