Update docker.io/library/postgres Docker tag to v18

inventories/chaosknoten/hosts.yaml

@@ -232,7 +232,6 @@ ansible_pull_hosts:
     public-reverse-proxy:
     zammad:
     ntfy:
-    spaceapiccc:
 msmtp_hosts:
   hosts:
 renovate_hosts:

roles/docker_compose/README.md

@@ -19,10 +19,6 @@ Should work on Debian-based distributions.
 - `docker_compose__configuration_files`: A list of configuration files to deploy to the `/ansible_docker_compose/configs/` directory.
 - `docker_compose__configuration_files.*.name`: The name of the configuration file.
 - `docker_compose__configuration_files.*.content`: The content to deploy to the configuration file.
-- `docker_compose__build`: Whether or not to build images before starting containers.  
-  Defaults to `always`.
-- `docker_compose__pull`: Whether or not to pull images before starting containers.  
-  Defaults to `always`.
 
 ## Links & Resources