Docker: Temporary failure resolving ''

Looks like the container does no have network access. Here is what I am seeing and below is the relevant config: anyone sees any mis-configuration? docker0 interface is up.

Step 3/8 : RUN apt-get update &&     apt-get dist-upgrade -y &&     apt-get install -y         build-essential curl file gawk gettext git libncurses5-dev         libssl-dev python2.7 python3 subversion sudo swig unzip         wget wget2 zlib1g-dev tzdata htop vim rsync xterm         sudo build-essential subversion libncurses5-dev zlib1g-dev         gawk gcc-multilib flex git-core gettext libssl-dev python &&     apt-get autoclean &&     apt-get clean &&     apt-get -y --purge autoremove &&     rm -rf /var/lib/apt/lists/*
 ---> Running in 01ed3f3c46ea
Err:1 focal InRelease
  Temporary failure resolving ''
Err:2 focal-security InRelease
  Temporary failure resolving ''

config zone 'docker'
	option input 'ACCEPT'
	option output 'ACCEPT'
	option forward 'ACCEPT'
	option name 'docker'
	list network 'docker'


config interface 'docker'
	option device 'docker0'
	option proto 'none'
	option auto '0'

config device
	option type 'bridge'
	option name 'docker0'
	option bridge_empty '1'