td-agent-bit.conf requires use of filter for service to start properly

[UiP9AV6Y]

the @INCLUDE statements make it necessary to use at least on of each plugin type (input, filter, output), otherwise fluentbit fails to start due to an invalid configuration. fluentbit complains about glob patterns which do not resolve to any files (tested with version 1.3):

[mk_rconf_read_glob] glob: no match

one workaround is to use a noop modify filter (e.g. rename a field which does not exist)