Merge pull request #389 from squat/update_iptables_packages

Docker: update iptables packages

Makefile

@@ -46,7 +46,7 @@ BASH_UNIT := $(shell pwd)/bin/bash_unit
 BASH_UNIT_FLAGS :=
 
 BUILD_IMAGE ?= golang:1.19.0
-BASE_IMAGE ?= alpine:3.15
+BASE_IMAGE ?= alpine:3.20
 
 build: $(BINS)