It looks like is failing to pull the alpine image.
can you try this and see if it succeeds?
$ docker pull alpine:3.14.2
you should get something like:
3.14.2: Pulling from library/alpine
Digest: sha256:e1c082e3d3c45cccac829840a25941e679c25d438cc8412c2fa221cf1a824e6a
Status: Image is up to date for alpine:3.14.2
docker.io/library/alpine:3.14.2
It looks like is failing to pull the alpine image.
can you try this and see if it succeeds?
$ docker pull alpine:3.14.2
you should get something like:
Succeeded:
I did it! I mistook Dockerfile.
Great!