Docker Image Build Strange Behavior With Network Access

I'm trying to build an Ubuntu based docker image. I'm using Pop_OS as the host OS. My Docker versions are up to date.My /etc/docker/daemon.json file contains:

{"dns": ["8.8.8.8", "8.8.4.4"]}

Basic MVC for the Ubuntu Dockerfile

FROM ubuntu:latestRUN apt-get install build-essential

and issuing docker build . ends up with

0.210 E: Unable to locate package build-essential------Dockerfile:2--------------------   1 |     FROM ubuntu:20.04   2 | >>> RUN apt-get install build-essential   3 |     --------------------ERROR: failed to solve: process "/bin/sh -c apt-get install build-essential" did not complete successfully

removing the apt install line, and inspecting the /etc/resolv.conf in the container shows

root@0a3c00aaaae0:/# cat /etc/resolv.conf nameserver 127.0.0.11options ndots:0

Changing the Dockerfile to

FROM alpine:latestRUN apk add curl

and running docker build . is successfuland inspecting the /etc/resolv.conf shows

$ docker exec -it <container> /bin/sh/ # cat /etc/resolv.conf nameserver 127.0.0.11options ndots:0

but instead of having no access to the network, I'm able to ping google and interact as expected.

Does anyone have any clues as to what is causing this?