✸ make generate
# Avoid prompting for sudo unless the permissions actually need to be chnaged by piping find to xargs
find example-keybaseca-volume/ -not -user $USER | xargs -I {} -- sudo chown -R $USER {}
docker build -t ca -f Dockerfile-ca ..
Sending build context to Docker daemon 7.078 MB
Step 1/25 : FROM alpine:3.11 AS builder
Error parsing reference: "alpine:3.11 AS builder" is not a valid repository/tag: invalid reference format
make: *** [Makefile:14: build] Error 1
Following the instructions, this step fails: