Hey mate, I was unable to get Go working on ipfire I think it is not included and I don’t see it as a pakfire.
What I did find tho is someone has created a docker image that compiles the filebeat repo for raspberry pi. So in an external device I am building filebeat 7.11 using the output from that docker image, and I stick it in a github repo that I pull to ipfire and I run the compiled filebeat on ipfire.
It is working, but yea had no luck getting golang working on ipfire so gave up on the thought to compile on device.
And I am using certificates to encrypt and authenticate to logstash so this is so much better than the remote syslog option 
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