mojang-api

Public Mojang API proxy with automatic caching. See https://eclipse.skinsrestorer.net/docs/ for usage & documentation

Sysctl

You need to change your sysctl.conf file to allow this:

cat <<EOF > /etc/sysctl.d/10-mojangapi.conf
net.ipv4.ip_forward=1
net.ipv6.conf.all.forwarding=1
net.ipv6.ip_nonlocal_bind = 1
EOF

Add ipv6 range to interface

ip route add local <ip here>::/64 dev eth0

Docker daemon config

cat <<EOF > /etc/docker/daemon.json
{
  "ipv6": true,
  "fixed-cidr-v6": "2001:db8:1::/64",
  "experimental": true,
  "ip6tables": true
}
EOF