Docker networking on the built-in kernel
This release updates the bundled guest kernel used by Sandbox so Docker's default bridge networking can work with modern iptables-nft userspace.
Users running Docker inside a Sandbox guest should no longer hit startup failures like:
Warning: Extension addrtype revision 0 not supported, missing kernel module?
iptables v1.8.x (nf_tables): RULE_APPEND failed
This is especially relevant for Alpine-based root filesystems that install Docker from apk, where Docker configures bridge/NAT rules through the nftables-backed iptables frontend.