Spawned containers (Lambda, RDS, EKS, EC2, ...) join services.docker-network,
but the address they were given to reach Floci was its IP on the first
user-defined network it is attached to. Once Floci is also attached to an
emulated VPC network, that address is unreachable and every Lambda times out
with "Failed to get next invocation". Prefer the configured network when
Floci is attached to it.
Zakaria