Required to fix build with -buildmode=pie.

See: https://gitlab.alpinelinux.org/alpine/aports/-/issues/15809

diff -upr cs-firewall-bouncer-0.0.31.orig/Makefile cs-firewall-bouncer-0.0.31/Makefile
--- cs-firewall-bouncer-0.0.31.orig/Makefile	2024-03-11 12:16:54.821528260 +0100
+++ cs-firewall-bouncer-0.0.31/Makefile	2024-03-11 12:17:00.764879000 +0100
@@ -23,7 +23,6 @@ ifneq (,$(DOCKER_BUILD))
 LD_OPTS_VARS += -X 'github.com/crowdsecurity/go-cs-lib/version.System=docker'
 endif
 
-export CGO_ENABLED=0
 export LD_OPTS=-ldflags "-s -extldflags '-static' $(LD_OPTS_VARS)" \
 	-trimpath -tags netgo