Currently, logs are unified into a single log file.
If that eases push to ElasticSearch / OpenSearch,
it doesn't offer a comfortable reading with grep/tail/etc.
The new structure will store log files in:
- /var/log/www/<service>/<instance>-error.log
- /var/log/www/<service>/<instance>-access.log
For a service, for example Phabricator, all the containers
have their web logs in the same place, to ease grep search.