- Switch FROM weejewel/wg-easy:latest (4yr old, Alpine 3.11) to
ghcr.io/wg-easy/wg-easy:latest (actively maintained, Alpine krypton)
- Use update-alternatives instead of raw ln -sf to flip iptables
from legacy to nftables backend
- Fix compose build context: ./vpn -> . (Dockerfile was at same level)
The weejewel/wg-easy image lacked iptables-nft package in Alpine 3.11.
The new official image has it available, we just flip the alternatives.
The old ln -sf approach was fragile across Alpine versions.
