feat(docker): bump Alpine from 3.19 to 3.20

- Fix iptables and iptables-nft behavior
- Address systems not supporting iptables-legacy, see #2304

Dockerfile

@@ -1,5 +1,5 @@
-ARG ALPINE_VERSION=3.19
-ARG GO_ALPINE_VERSION=3.19
+ARG ALPINE_VERSION=3.20
+ARG GO_ALPINE_VERSION=3.20
 ARG GO_VERSION=1.22
 ARG XCPUTRANSLATE_VERSION=v0.6.0
 ARG GOLANGCI_LINT_VERSION=v1.56.2