backports/forgejo-runner: new aport

backports/forgejo-runner/forgejo-runner.pre-install

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+addgroup -S forgejo-runner 2>/dev/null
+adduser -S -D -H -h /var/lib/forgejo-runner -s /sbin/nologin -G forgejo-runner -g forgejo-runner forgejo-runner 2>/dev/null
+
+cat >&2 <<EOF
+* In order to setup the runner, create a config file
+* in /etc/forgejo-runner/config.yaml (either from .example.yaml,
+* or generating your own with 'forgejo-runner generate-config'),
+* then register it with 'doas -u forgejo-runner forgejo-runner register'
+* ran in the /var/lib/forgejo-runner directory.
+EOF
+
+exit 0